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Tri-top Chest Binder

Manufacturer: Underworks
SKU: 983
4.8 111
32.99 USD
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  • Nylon Spandex
  • Sizes - Measure Chest-Inches: X-small 28-30 / Small 31-33 / Medium 34-36 / Large 37-40/ X-large 41-44 / 2X 45-48 / 3X 49-52 If unsure, please order the next size up
  • EXTREME FTM TRANSGENDER NON-BINARY GYNECOMASTIA CHEST FLATTENING CHEST BINDER - Flattens the chest and promotes a masculine looking chest
  • 3 POWERFUL MEDICAL GRADE FABRIC LAYERS PROVIDE MAXIMUM COMPRESSION POWER - Feel the confidence of flatness!
  • UNDETECTABLE UNDER CLOTHING - Neckline is cut low enough to not show through your shirts. Flat stitched around the shoulders for comfort.
  • MADE IN USA - High Quality Construction for Maximum Durability
111 Customers reviews
4.8 111
Starts Rate Percentage
5 star
87%
4 star
11%
3 star
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Awesome first binder!
I bought this as my first binder in size xs and though it wouldn’t work very well but it does! It compresses so well and I love it. A little uncomfortable around the bottom hem but that can be fixed by rolling it up a bit. Overall, very happy. Would recommend.
Guest |
very good quality
this is a defintaly an upgrade from gc2b. i finally have a binder thats not to loose or to tight its just right and i love this material better then gc2b. underworks medium fits me better then a gc2b large or medium.
Guest |
Definitely recommend
This is my second binder, my first one being from gc2b, and i can confidently say this is a much better upgrade. Though the fabric isn’t as comfy or sensory friendly, the quality is much better compared to gc2b’s which tears pretty quickly. I also don’t have to readjust it nearly as often, if at all, and I feel more comfortable moving around while wearing it. It also works very well at making me flatter. I initially bought the wrong size but the exchange policy is very easy to follow and I got my exchange only a week or two after sending the wrong size back. I definitely recommend this binder and following their sizing chart and guide. It’s pretty accurate, but if you’re in doubt then order the next size up.
Guest |
Going back to Underworks! <3
I got my first binder 12 years ago from Underworks. After a few years of using Underworks binders that kept up very well and for YEARS, I was curious about other companies. Honestly? My experience has been that in 12 years of buying binders, Underworks has kept up as my favorite, along with being my most trusted choice, consistent quality and all. I'm glad to go back to Underworks. I remember when I bought my very first binder. Tri-top is great. Out of the types of Underworks binders I've gotten, this one may be my favorite. My 2nd buy. Comfy, durable as a server/waiter and as someone who goes out clubbing/dancing a lot.
Sean |
Wow
Yall. I am a 38E (at least, havent bought a bra in years and they were too small lol) and when I tell you this thing makes me FLAT. Genuinely the best, most comfortable binder I have ever worn, the material surprisingly doesnt bother me considering I have sensory issues but if its scratchy there is also a cotton lined version of this on the site. I have done intense exercise and it has never restricted my breathing or caused back pain which others have caused for me. It fits wonderfully over my entire chest without any gaping at the bottom which I have had issues with in the past from brands advertised as being for larger chests. I wear this thing to work every day in a hot kitchen and I am comfortable the entire time. I have had one for three years, only ever machine washed and dried and it only has one small hole around the armpit, the seams arent even close to becoming loose. I am NOT gentle or easy on this thing. I only have one bc I got it before I came out, but I'm leaving this review as I'm buying more and I can never see myself buying a different binder again.
Guest |
My favorite binder
I've only worn gc2b binders before, and I can confidently say this is much better. I've had this a few days, and the only issues I've personally had are some tightness in the arm holes, but in my experiences that isn't all that obtrusive. I can breath much deeper in this binder, and I've had almost no back or rib pain, even after long period of time with no rest. The fabric does remind me of trampoline fabric, but it's much stretchier, more breathable, and regains its shape easily. It rolls up a bit, but that also doesn't bother me. If you have sensory processing issues you may want to steer clear of this due to the fabric, but buying some cheap cotton or polyester to patch over any problem areas, or using baby powder to reduce rubbing would be a good solution. I'll add an update to see if that tightness changes after washing the garment once or twice, but so far that'w my only complaint! This is an awesome binder for sure :)
Mari |
Tri top binder.
The binders I bought from Underworks in US and got sent over to the UK are really comfortable and supportive. Gives me so much more confidence as a non binary person. Sits really well under my clothing.
So much more comfortable than the ones available in the UK. And so well made.
I thought they were a little bit expensive but was well worth the money as they ate made to last for years.
A very good investment.
Arin W.
Guest |
Tri top binder.
The binders I bought from Underworks in US and got sent over to the UK are really comfortable and supportive. Gives me so much more confidence as a non binary person. Sits really well under my clothing.
So much more comfortable than the ones available in the UK. And so well made.
I thought they were a little bit expensive but was well worth the money as they ate made to last for years.
A very good investment.
Arin W.
Guest |
Amazing Binder for Trans Men (FtM)
As others have remarked, the fabric is a bit itchy, but for me personally that downside is FAR outweighed by the positive! This binder is incredible with flat it gets me--even in tighter fitting clothing I find it gets me to look almost completely flat. I can comfortably wear it all day (8-10 hours) without the itchiness bothering me, although I do find that I tend to sweat more with it on. However, it has been an incredibly hot summer so that may be the true cause. I have four now and I am very happy with the purchases. I ordered a large.
Guest |
LOVE
I have been wearing this model since 2015, and it is my favorite one I have ever tried. If you have a larger chest or want extreme compression, this is a great option. I wear a 32 H in bras, so this model though doesn't completely flatten me but does get pretty close. Under a bulkier shirt, button down, or sweatshirt, it works fine. It fares well in the washing machine on a gentle cycle and even be dried occasionally if needed. It also lasts multiple years, especially if you give it a rest day in between uses.
Guest |
Really good!
This is the best binder I have ever tried! Really comfortable. Flattens well and provides good support. Only thing I don't like is that some of fabric is a bit scratchy. Overall Highly recommend. Good stuff.
Guest |
This is the staple trans masc binder
I have been binding my chest ever since I was a freshman in highschool (10 years ago now), back then there weren't a lot of companies that created binders, so it was hard to find stuff that worked for me. I've been through the ringer with binders, especially as someone with a larger chest. This is the binder to beat, the nylon makes it feel more breathable and they're perfectly fine for swimming as well. Nothing else binds my chest more comfortably and gives me the results I want more than this binder. I have recommended to so many trans masc people. Nothing slips out the sides or in front, which has been a problem in the past with other binders I've had. I really couldn't recommend this more. If there is one thing I will say though, they've got about a 2-3 year shelf life before you need to purchase a new one. Which honestly given the quality and price, totally worth it in my opinion. If you get a lot of millage in them like me, wearing them almost every other day, they'll wear out like any other piece of clothing or shoes. So having to renew them is to be expected. I end up using the super-worn in ones for skating or for hang outs at my friends house. Again, overall given the price, it's a great bang for your buck. I've been using this company for 5-6 years and I'll probably continue to use them until I one day can afford top surgery.
Guest |
Awesome!
I’ve been using this binder for a little while now and I don’t have any major complaints so far.
I found the material to be a bit uncomfortable, but that was easily fixed wearing a tank-top underneath.
It doesn’t make my chest completely flat, but I have a very large chest so I knew it wasn’t going to, and it but its definitely 10x flatter than without
would definitely recommend!
Guest |
Pretty good! Will try again, too large
I bought this as my first binder after mostly using TomboyX's compression bras. This works SO much better, but I would recommend sizing down. As it is, I sized down just a bit since my underbust is smaller compared to my chest. But the binder I got is still a little large. It works fairly well, but my chest is still visible and it feels looser than it should. I'm keeping it because I play trumpet and it's still easy to breathe; I'll probably be ordering the size down when I can and see how that works!
Guest |
Surprisingly good!
I got an X-LARGE a while ago and just ordered a large. It binds extremely well. I was using GC2B before but they had a recent dip in quality so I came here. These bind so much better and last longer! My only complaint is the armpit seams, idk if it’s just an autism thing but the armpit seams were diving me crazy, it was an easy fix though as I just sewed a piece of fabric over it. 5 stars!
Guest |
Impressive compression
I am amazed at how thoroughly this binder flattens me out! I have heard mixed opinions on how well binding works in general but for me (size XL, D cup) the difference was incredible. I have a compression top from a different brand (which is not a binder) and this is substantially better at compressing and flattening, it makes a huge difference. Not too difficult to get on, and fortunately quite easy to take off. My only complaint is that the neckline is very high on me and the bottom of it tends to bunch up a little bit - the material is pretty stiff so it doesn't want to flatten out when it does that. Overall, I am very impressed, it's really amazing to have the option of wearing this and seeing such a visible transformation.
Guest |
Terrible texture, amazing fit
For the price, I am NOT mad at this binder. When I first saw it in the bag I panicked and thought it was cheaply made. I was between sizes and chose the larger in the interest of unobstructed breathing, and it's still very snug and binds really flat. The material is stretchy but super supportive and evenly distributes pressure. Feels more like a compression vest than gc2b, which is the only brand I can compare to. The entire binder is made of the same mesh material, which is a little abrasive, like a modern burlap; not the most comfortable especially on the nipples, but the fit is worth it, and there's workarounds. Fits as well as binders twice the price. I would not work out in this, but that's a given for high-compression binders. The neckline is large enough that you can fit your hand down in there to help scoop and shift things to where they should be.
Guest |
Very High Quality!!!!!!
I bought a size XL (approx 210lbs) and it works wonders! It started to stretch out after a few months of use, but not badly at all. I've lost some upper weight since then and I'm coming back for a size smaller!
Guest |
Buy this one
This is the best chest binder that I've tried. I've had 4. The material is durable, flexible and washes nicely. It's extremely breathable - it's made of a sort of mesh that has great airflow. It's a good length in the front for me as well. It doesn't roll up half as much as gc2b. I previously had the cotton lined version of this and it was more comfortable, but it was really hot and kinda stifling since I live in the South. The cotton lining could actually be really nice if you live in a cold place. Anyway, buy this one. All others are overpriced and cheaply made. This thing is a medical grade garment.
Guest |
So far so good!
I have 3 gc2b binders and they do the job to and extent. I have a pretty big chest so it doesn’t make it as flat as I want to be or for my dysphoria to go down a bit but flatter than without it. I came across a comment about underworks and read reviews and thought I should give it a try. Got it today and put it on and love it already. Makes my chest flatter than the gc2b ones. Material isn’t as soft as gc2b but I’ll get used to it. I wear a 2xl in the other ones but I ordered a XL in this one. Fits great and I could probably get away with even a large but might be too tight. Only 2 more months of wearing of these then I get my top surgery! Great product.
Caleb |
so much better than any other brand!
i got my binder today and i already love it. i took my measurements to get the correct size and at first i was worried it would be too big, but it fit perfectly when i put it on!! flattens my chest WAY better than the old binder i got off of amazon! will be buying again.
Guest |
Amazing
The bind on this is insane. GC2B barely binds my chest, while this one just gets rid of them completely as if theyre not there. Love this
Guest |
Best Binder Ever
The Tri-top is the first binder I ever got, and it probably is the only one I will ever get; I’ve had this thing for five years, and it still binds like a champ. I got the white, and it has served me well. It has picked up color, but that’s to be expected after 5 years, honestly. About to order another one in black! I can't wait to use it!
Guest |
really good
i do figure skating and previously had a gc2b binder and it was awful. could not breath and my chest hurt. if ur an athlete get this binder, it flattens my chest surprisingly nice considering its mesh, i can actually breathe while skating/ running, it’s comfortable, and i dont get pools of sweat on my back bc of the mesh. one thing i did notice at first was the edges of it being scratchy (so if you have sensory issues with that sort of thing wear a thin shirt under it) but after less that a week of wearing it, the scratching went away. the gc2b binder i had was not seamless so it looked like i was wearing a bra which really bothered me but this one is seamless so i dont notice it at all. one thing to note is i tape my chest with transtape/ medical sports tape which helps a lot with feeling more comfortable and helps flatten better plus no sweat pools lol. but whenever i wear this binder without tape its kind of scratchy on my nipples lol, so if you dont wear tape maybe put something there. but ive had these binders for maybe 3 months now and have not noticed any problems at all, they are good quality and super comfortable (sometimes if forget its even there.) i can breathe and its honestly improved my mental health a bit.
Guest |
Comfortable and effective
I was looking for an alternative to getting a gc2b binder because I've been wearing mine for over 2 years and desperately needed a new one, but I'd heard their brand went down in quality significantly. I didn't want to pay for another one from them and be disappointed so I've been looking for alternatives and Underworks exceeded my expectations by a mile. It's more comfortable, significantly easier to put on and take off, and it binds better than my last one did even when it was new. I had my doubts as a new customer but I'll definitely be coming back. The only downside is that it took quite a while to get to me but otherwise it's perfect.
Guest |
DREAM COME TRUE
this has been my dream binder for ages.
before i grew old enough to have my own card i would open this page from time to time and imagine myself buying it one day.

today was the day it arrived.
first impressions were "oh, this is tough. this feels like a solid."
surprisingly had no troubles slipping it on as an S and afterwards it quickly became more comfortable and stretchy. when i looked in the mirror i couldn't believe it. it's about as flat as i've ever seen myself. the pressure is firm but comfortably so, and evenly distributed. the binder follows my body well and things stay in place even when i raise my arms or crouch. actually feels like my chest is flat.
i feel more masc than ever and i can finally straighten my back out in public and still be flat. i didn't know it would, but this boosted my confidence immensely.
i'm so happy.
thank you, underworks.
Anton |
My Sons First Binder
My son loves his first binder. Got the exact size that fit his measurements and he says it fits him perfectly! He can breathe great with it on and is so happy with it! He says he feels like a god now!
Guest |
Would definitely recommend
I'm transmasc nonbinary and this binder has made me so much more comfortable and helped to reduce my dysphoria as much as possible. I got a gc2b one before this and it was a bit more stretchy and comfortable but it didn't bind all that well. This one gets me as flat as I think any binder could and is still quite comfortable. I would also highly recommend getting another one in a size up for exercise or wearing for longer periods. I initially did this for swimming (which I haven't actually tried with it yet) but it still gets me quite flat and I can breathe a lot more deeply which is important for exercise and also allows me to wear it for more than 8 hours with little to no discomfort.
Guest |
This binder is magic - Jay
As a trans guy I've gone through a few binders but this, nothing binds like this binder does. I'm over 250 pounds, have double d's according to google, and am very...well.... thick and wide and curvy, I got it in an x-large. This gives the Illusion of No Titty. Like they never existed, gone, magic.

Yes, the outside material is a little rougher than other types of material but the inside is soft so it won't bother you too much, yes it's gonna be hard to get over your head and arms if you're chubby but you shouldn't worry about it stretching out
Pictures of me wearing the binder below
https://imgur.com/a/hTr6Gun
Guest |
vs. Gc2b
(This is the size medium, color black, also I don’t have gynecomastia, I’m a trans dude so this may affect my experience)

I got this binder a few days ago, before I was using the Gc2b medium Half Binder.

One thing I noticed right away is that the fabric is a lot stiffer than the Gc2b. It also feels more mesh-y. The comfort is pretty much the same between the two, but the Underworks is a bit itchy. Another thing is that the Underworks medium is a lot larger than the Gc2b medium, but the Gc2b was a little small for me so no complaints there. As for how it actually binds, it binds quite a bit better than the Gc2b. With the Gc2b, it sort of flattened my chest, but didn’t do much without a sweatshirt or something over it. The underworks however does not have this problem, with it I’m the closest to flat a binder can realistically get me. Definitely helped my confidence a bit! I highly recommend this binder! There are other things I’d like to mention but I don’t want this to turn into an essay. Thanks for coming to my TedTalk!
Guest |
Amazing binder
I’m a trans guy with a c cup and 34” bust (size M) and this binds so well compared to other binders I’ve tried, gc2b being one of them. Really happy with the results and wayyyy more breathable than I was expecting based on other reviews I’ve read (even more breathable than my gc2b one which doesn’t bind as well). Couldn’t recommend this product more, it’s done wonders for my dysphoria. Isn’t noticeable under semi-tight tops either and is quite comfortable despite the plastic-y texture.
Guest |
Amazing binder
I’m a trans guy with a c cup and 34” bust (size M) and this binds so well compared to other binders I’ve tried, gc2b being one of them. Really happy with the results and wayyyy more breathable than I was expecting based on other reviews I’ve read (even more breathable than my gc2b one which doesn’t bind as well). Couldn’t recommend this product more, it’s done wonders for my dysphoria. Isn’t noticeable under semi-tight tops either and is quite comfortable despite the plastic-y texture.
Guest |
5 stars!
Love this binder! It barely shows through my t shirts. Just looks like I'm wearing an undershirt. The half tank style helps me breathe easy. It doesn't squeeze my stomach to where I can't breathe. Great quality too
Guest |
A binder for the broad shouldered boys
I’m ftm 5’11 240lb and have a c cup. My problem with other binders such as gc2b was always that although the compression was fine since my breasts are not too big, they were very tight around my shoulders (i’m on T and work out). This binder here, I got size 2X, is super comfortable and has plenty of room for my broad shoulders, all while binding very nicely and since it’s tri top and not just half top, no worries of breasts popping out while having to put my arms up! The only thing I dislike about it is there does seem to be excess fabric that bunches up at the neckline, but I plan to do a little sowing to fix that.
Guest |
Absolutely amazing!
I'm ftm and this is the first underworks binder I got. The wait for it was somewhat long, but 100% worth it! It binds extremely well and is surprisingly comfortable! It's very nice at the touch too, and while the stitching around the arms and etc was scratchy at first, it stopped bothering me after wearing it for less than a week! It doesn't restrain my movement, it doesn't make breathing harder... it's really great!!

I used a different brand's binder for a little over a year now, and I can already say that this one is much better for me. It's been ages since I felt comfortable enough to stop walking hunched forward and straighten myself, but with this binder I can finally do that! My back no longer hurts at the end of each day, and it's incredible! There's also a small thing it makes so much more enjoyable that I have to mention it, and that's receiving hugs! It might sound dumb, but I always felt very self-conscious during those, but for the past week that feeling was just completely gone!

In summary, this is the best binder I ever owned, and getting it was possibly the best decision I could've made!
Guest |
Great trans masc binder
I just got this binder and I am very happy with the results. I am ftm and have used mostly gc2b binders before this, which are more comfortable, but this one binds much better. I'm in between a gc2b medium and small and I got the medium for this one. I would honestly go a size up if you're unsure because these stretch a lot less than gc2b binders. And also I know you don't want to hear it, but smaller binders do NOT make you look flatter and can even have the opposite effect.
The material is much more sturdy and I personally don't have an issue with scratching of chaffing, but those with sensitive skin might need to wear a tank top underneath. I find the gc2b binders tend to unravel and get pretty stretched out after a while, so I'm hoping that this one lasts a bit longer. The front is double layered and the back is a single layer, but all the same material. I can breath well in it, and it feels cooler (temperature wise) than gc2b binders or other cotton binders.
I have a fairly large chest for my size, so there is a bit of a gap under my chest between my ribs and the binder since the material doesn't contour to your body as well, so it will show through thinner shirts. But I think it actually makes me look flatter because then I don't get a chest cliff. And if you're skinny with a larger chest, most binders will do this to some extent anyways.

Overall very pleased with the results and price and I would definitely recommend it. 9/10
Guest |
Had mine for 2.5 years now, it's great!
Hey I'm trans this was the first binder I ever bought. Mine looks beat up and faded after nearly daily wear, but it still works just fine.
I have beige and it does fade, I also vaguely remember it being scratchy at first. Only reason I need a new one is because I've gained weight, so mine no longer is a safe fit.

After nearly three years it still binds very well, and at a lower price than gc2b it's a steal. Please remember to bind safely!

Tip for any  other trans people: I suggest having 2 in rotation. It's really easy to have one ready if you are washing the other.
Max |
nearly flat!
Im a trans guy with a pretty large chest. 3x in gc2b and i have to wear a 4x over that to even come close to how flat this one has got me. i ordered a 3x using my measurements from gc2b as reference and it was a bit large but im more than happy with how flat it makes me. it is a bit scratchy and long but folding helps with the length. will definitely buy more from this company!
Guest |
i have never felt more myself!
i've always had a pretty large chest, despite being kinda slim, my chest always stood out...like a lot. and i thought binding wouldn't work that well for me because of that and i was pretty worried but this worked amazingly.
despite what other reviews say i'd give it a 9/10 comfortability !!!
it compresses my chest so well i look almost completely flat !! as a nonbinary person i am very pleased. i highly recommend underworks if you have a larger chest^^
Guest |
A great first binder
I bought this as my first ever binder (I'm FTM), and it's honestly perfect. I'm on the smaller-chested side, but I haven't experienced any rolling up at the bottom or any discomfort whatsoever. The compression is great, and I can wear it for 6-8 hours a day no problem. I live in the UK, so shipping was quite expensive (about £20) but it arrived super quickly and came in discreet packaging. Overall I'd give it a 10/10, definitely recommend it as a first binder.
Guest |
Very lovely
I got the size L. It fit amazing and is actually very comfortable to wear despite the rough material. Putting it on wasn’t much of a struggle and only took a minute to completely fix it. It doesn’t fold up to me since I don’t do a lot of movements but I see how it can be annoying. Despite that I’m very happy with my purchase!
Guest |
good binder for ftm guys
honestly, don't waste your money on gc2b's products if your bigger than like a medium, just get this one. It binds just as well, if not better, than gc2b. This one binds my chest down to almost flat, I never achieved being fully flat but i was super impressed with this one
it is scratchy like other reviews mentioned but if it bothers you, put a light tank top on underneath and the scratchiness is gone. Also, the tank top trick works to help minimize the bottom hem from rolling up!

Otherwise, it's super fast shipping, takes no time to put on, and feels great.
Simon |
Great compression, not so comfortable
I'm a trans man with a 38 inch chest and got the size large. First things first, the compression on this thing is great. It makes me nearly flat, which is awesome. I've been wearing a gc2b binder in the same size for years and it doesn't compress nearly as well. This binder does have some negatives, though. For one, it's pretty uncomfortable. Discomfort from binding is to be expected but the material is pretty scratchy and it rubs under my arms pretty bad. It also bunches up at the top so that there's an odd-looking point, and the bottom hangs over by rib cage so that there's a weird gap that shows through thin t-shirts. If you're thin but have a large chest, just expect this from binders honestly; gc2b was the same. That being said, the compression more than makes the discomfort worth it for me so I'm very happy with this binder. If you want really good compression and you don't mind some discomfort, choose underworks. If you want something super comfortable but doesn't compress quite as well, choose gc2b.
Guest |
Pretty great!!
This is my fourth binder, with three from gc2b. I ordered a black medium, as a "long" C-cup. Here's my review!
Convenience: my binder arrived about a week after I ordered it (I live in the US). The packaging was sleek and the binder was clean, and it was discreet as well!
Comfort: while not as comfortable as its gc2b counterparts, it is made of a stretchy material that, while rough, sits comfortably against your skin.
Color: I ordered the black one, and it still hasn't lost any color, multiple loads of laundry later!
Cost: it is the cheapest of the three best-known binder companies (Spectrum Outfitters, gc2b, and Underworks), and has a great value!
Flatness: I have three gc2b binders--a large, a medium, and a small. This binder, I ordered as a medium, and it came about the same size as my small gc2b one--which is to say, pretty tight, but not strangling me, and binding well. I can still take a pretty deep breath! That said, if you're in between sizes, as I was (between small and medium), please order a size up!

Overall, this binder is great value, great flatness, it looks good, and it feels good! Definitely ordering again!
Guest |
WORKS LIKE A CHARM
I'm a trans guy and this is my first binder. Obviously, it doesn't leave my chest completely flat, but a cis man of my size and shape wouldn't be completely flat anyway. It definitely feels very tight and compressive, but it doesn't hurt and as I am someone who likes compression and wore one of those vest things as a child, it feels nice. Would definitely recommend to anyone with a small-to-medium chest.
Guest |
My new favorite
I have a pretty small figure,  but my chest has always been pretty big, which makes binding more difficult ! with other brands i've used a size small, with a size medium ON TOP to make sure everything's in place and im comfortable. BUT with this one a size small fit perfectly and exactly how i hoped. It has the perfect amount of stretch and still compressed how i want it to. Seriously my new favorite binder. i'll probably be ordering a few more
Guest |
Made Me a Happy Man
I did a lot of research and review-reading before purchasing, and very anxiously ended up choosing this one. The only real concern I had from reviews I saw was the mention of it rolling up a bit at the bottom hem. That does happen sometimes, I won't lie--but not frequently or irritatingly enough to make me say it's a bad fit. I'm wearing it as I type this review--it makes me feel completely satisfied by how it flattens me, and it doesn't make me struggle with breath as some products have. It even reminds me to straighten my spine. A worthy purchase!
Bronwyn |
Nice
In my experience as a trans-man, this binder works great. Obviously I'm not completely flat, seeing as it can't magically make my chest disappear, but it works just as well as GC2B and is even a little cheaper to buy. I'm quite petite, but I didn't have any issues with the binder sticking out from my ribs like other reviewers have mentioned. I ordered the tan color, and it does run a little on the yellow side, but it isn't too noticeable of a difference. I have shorter, wide shoulder, so I didn't have the issue of the material cutting the skin on my armpits or being too high for me to wear t-shirts. Overall, a good binder.
Guest |
this boi is happy
im a ftm trans person. i tried gc2b's binders and even though they're quite comfortable when it comes to stretching and movements, they don’t bind as much as the tri top from underworks does. i have a large chest (and also a condition that makes one side much bigger that the other, which made it fairly impossible to get a binder that would do its job well) so i need a stronger type of binding. if you have a bigger chest or broader shoulders (or both, like me), underworks is the one for you.

binding review: 10/10. like i said, i have a big chest (and im also fat) so i needed something much tighter and this one did the trick.

comfortable: 8/10. you need a few minutes to put it on the first few times and you have to adjust a bit. after you get used to it and the fabric stretches a little, it won't be a big problem. i've seen people saying that it's uncomfortable especially on the armpit part because it scratches. i have to say, i haven't met this problem at all. yes, it is tight, but not as extremely as i expected.

quality: 9/10. it's well made, with good quality fabric. the spandex is very comfortable and it attaches to my back like a second skin and doesn't move, like the gc2b one does.

the only bad thing is that it rolls up a bit on the stomach. the reason is because, as humans normally do, i have a tummy. it's not extremely uncomfortable though, since it's tight enough, the rolling thing doesn't really make the binding process different.

i know everyone is different, which is why i'd like everyone who is reading this review to keep in mind that my experience is very personal and you might find the product much different for your own person.

all in all, i'd give it a 9¾/10. best binder i've tried for now and i will definitely buy it again once this wear out completely (since i basically wear it every day).


hope this helped :) happy binding and stay safe!
rob |
Why mess with the rest when tri-top is the best?
I've had my tri-top chest binder for over a decade, and the only reason I need to get a new one is because my bust went up in size due to weight gain. I've tried many different styles of binders over the years, from zip ups to velcro to pull-overs from other companies, but time and again I just return to the tri-top. It's comfortable. It's breathable. Once it's on, you can practically forget it's there. Even if mine doesn't get daily use, it has seen a lot of use over the last eleven years, and has sat by and watched other brands' binders fall to the bottom of the drawer while it remains the one I reach for. I recommend the tri-top anytime people ask me for binder recs, and I'm so glad that underworks continues to be here to sell this awesome binder. You folks rock.
Liz |
Dope!
I’m a trans man and this is the first binder I’ve bought and I really love it. I already have masculine shoulders and this made me look 10x better and gave me a masculine chest until I can get surgery. The only complaint I have is that the cut in the front where it dips down by my sternum is a little loose but everything else fits perfect. I measured 37” in the chest so I ordered a large and it’s great. Thank you guys for making this product!
Guest |
Extremely happy!
I currently have two of these. The older one is about a year old and still in very good shape considering i've worn it al least 4 a week. I like the tan color a lot! The white gets a little dirty looking over time and the tan doesn't show through under clothes. (I'm white tho so it obviously is convenient for me. Would be great to get more skin shades here!) Easy to wash. Binds extremely well!! Makes my life 100 times better and easier. I like the shoulder straps because they don't really show (like some of the gc2b ones do) Pretty stiff straight from the packaging and has that factory smell but washing and wearing fixes that pretty quickly.
Shipping to europe was unfortunately pretty expensive but very fast & the regular updates were nice. All in all, great product for transmasc folks, 100% recommended. Worth every penny.
Guest |
Great for larger chests!
I wear a 26HH bra size and at first I was worried whether any binder would work on me, but the Tri Top makes it look like I’m almost completely flat! Only a tiny bump is visible and that’s only if I’m wearing a tightly fitted shirt. However despite all this compression, this binder is still very comfortable to wear and feels very light and breathable. I would highly recommend this binder to anyone with a larger chest - you won’t be disappointed
Guest |
Good quality, long lasting
Bought two of these about five years ago and I'm only just now having to replace them. I bind almost daily with little to no problems.
Guest |
First one
I was very excited to get this in the mail. Was a bit more difficult than I anticipated, but was my first time ever putting one on. I am very pleased with the amount of compression that it gives. Not sure if I went with too small of a size since I was right at the end of the sizing. My chest just seems to not have enough space to go to. Maybe I just need to learn how to organize it in there! I am very pleased though and will definitely be making another purchase.

Mircea
Megan |
Lasts forever
I was gifted this binder used fifteen years ago, and I wore it once or twice a week for a couple of years. Then, it sat in my closet for a long time, sometimes being used for a Halloween costume where I needed a flat chest. About a year ago, I pulled it out and started wearing it on an almost daily basis. I’m a 36DD and it still makes me almost flat after all these years. I’m finally buying a new one, not because the old one wore out, but because it’s dingy looking and it makes me self conscious to have the edges showing under tank tops.
Guest |
Would Reccomend For Smaller Chests
I would recommend this to anybody with a chest a bit on the smaller or average side. If your more above average, consider gc2b. I loved this, and plan on buying many more!
Guest |
first time binder
This binder is super comfortable (as far as binders go). I can still breathe freely and can move around a little. The fabric is breathable too and doesn’t make me super sweaty. It also doesn’t irritate my skin. Mine did get discolored really easily though, the first time I washed it (hand wash, hang dry) it got weird red and brown splotches. I also don’t like that the bottom of the binder hangs out. I have a bigger chest which leaves a gap between the binder and my tummy, luckily if my shirt is tucked in it’s not noticeable. I like this binder as a first time buy and it definitely makes me flat, but I wouldn’t buy it again. Between the discoloration and the gap, it looks ugly, and I’m afraid that it will stretch with all the nylon.
Guest |
LIFESAVER
I wore 2 GC2B binders every day for a year, switched to this and only wear 1 binder now. It’s perfect, and way more safe. BLESS.
Guest |
Fantastic binding
I'm a 15 year old FTM guy and this binder works fantastically. It's really not uncomfortable at all and flattens me down very well. I'm about a 38C/size L sports bra and my chest is completely flat in this. Would highly recommend this binder.
Guest |
In love with this binder! But...
This is my first binder as ftm.  I am a 36DD with a 24 waist and 37 hips which makes binding a bit more awkward than I anticipated.  This binder really does it's job and I video-chatted my best friend after I put it on gushing that by boobs were gone.  It did wonders for my self-esteem and honest to god works for larger chests. It is also not that uncomfortable!  I've only worn it for 4 hours at most so far but didn't have any discomfort during that time.

The "but" comes from having curves and that this binder doesn't "hug", I guess.  So it manages to squash my chest but the lower 3-4inches of fabric hangs off and just floats over my upper stomach making it clearly visible even in looser clothing. My next binder is going to be a full-torso binder but I'm concerned it is going to make my hips that more prominent. (All I really have going for me are broad shoulders. But I have my fingers crossed!)
Guest |
Underworks VS Gc2b
Ok so underworks are my first binder, I’m a 36/38 DD At 180 pnds. So at first I figured I’ll wear binder on occasions for example parties etc. Reasons it is restrictive, but it does the work. This original binder does the work I bought it in black and white. The black has stretched out and I’ve notice it started to give me that look as though I’m wearing a sports bra. That’s after 3 months of washing and wearin. I bought it in 2014 and decided to wear on occasion. From 2014 to 2016 I hardly wont it.
So in 2017 I wore it consistently from the end of September to December. By November it started to stretched, I worn it every day to work. Confindently it felt great, I was so flat I couldn’t believe it. Mind you I use to wear three sports Bras.
Ok i wanted something I could wear that felt comfortable, I bought a GC2b at first it felt great. But then when I took a pic, I realize it didn’t make me look as flat at Underworks.

Underworks makes you flat, I see now they have Econo ... N cotton version. It’s very highly I’ll buy the cotton with this original effect on it. For my thick Bois, Studs Ags, Trans . Big chested Underworks makes look FLAT !!!
Guest |
A great binder!
I've had this binder for 4 years now. Have worn it almost everyday and it has gotten tons of use. It's a little more loose after 4 years of use, but that's expected. This binder makes my chest basically nothing. I recommend this binder to everyone :^)
Guest |
great for bigger trans guys!
i've got a bigger chest, but this still binds well and is extremely comfortable. (definitely more comfortable than any compression sports bra!) personally, i prefer this style to the tank because i'm very chubby, and don't enjoy the pressure on my stomach and sides. if you're just looking for chest binding, this is what you'll want to buy!
Daniel |
my first ever binder
I've had other binders since then, but honestly this is the best one I've ever had. It was sent to me by a very gracious man on tumblr and I've been using it for almost two years (and it's mostly held its original shape and compression). It's a bit tough to put on, but that's because it binds so well.
Guest |
IT'S AMAZING
This is the first binder I've ever purchased, and it's simply amazing. I have a pretty large chest (I was an Aus bra size 10E which is a 32DDD USA) and I'm completely flat, I was actually so shocked when I put it on, I've never been so happy.
I find it so comfortable and I'm just in love with it. I find it really easy to put on and take off (remember when putting in on to step into it and pull it up to your chest). And overall it's just amazing.
I live in Australia and with normal shipping it was at my door within a 4 days as well.
100% would recommend to anyone looking for a binder
Gabrielle |
Does the job
I bought my first binder from underworks back in 2010, and this is my 5th since then.

This was however my first time trying the tri-top. I'm 33in so I bought a small.

Pros: It definitely flattens.
It's breathable
It's not uncomfortable

Cons: Mine sticks out where my ribs are, it doesn't cling to my body (I think this will be more of a problem for thin people) and the fact it sticks out makes it very obvious under my shirts.
It does start rolling after you've been sitting, and it's annoying to straighten out.
It has a fairly high up neckline which makes it impossible to wear anything but crew neck shirts.
It gives you underarm fat even if you thought you didn't have any.
Shoulder straps are too thick, makes tank tops impossible.
If you have any scratches in the area the binder is covering (I had one, not sure where it was from) but it was irritated by the binder and I noticed when I took the binder off it was stained with blood.

Although I personally find more negatives, it does the job and that's all I personally care about right now.

I wouldn't wear them for more than a few hours. When I first got one all those years ago I accidentally fell asleep at a friends house and woke up gasping for air. So be careful and make sure if you are starting to feel sleepy that you take it off right away. I find after 6-8 hours I will start feeling discomfort in shoulders/neck/back.

I hope this helps anyone who is new to these products.
Also I ordered it Monday, got it Wednesday and I live in a different country so it was very quick. Shipping was expensive for me though, used to be cheaper :(.

Jacob |
Great for first-time Binding (FTM)
I've been using this binder for a little under 8 months and I think it's okay. I ordered it in a medium just to be safe. I was a B-cup when I wore bras and I usually wear mediums in sports bras. This binder was good for a back-up binder. I have low-blood pressure so when I needed to bind or just to conceal my nips, I would use this because it fit a little more loosely than my gc2b but still bound. One thing I don't like about this binder is that the straps are quite thick and the cut is quite high. I don't recommend it if you live somewhere very hot like me and want to wear it with tank tops. However, it's great for t-shirts. The material is pretty flexible, surprisingly, but really scratchy on your nips after a long day. Overall, great for those who need a flexible but strong first-time binder. It's also super cheap comparatively and allows you to get a feel for what other binders you might look for in the future.
Oliver |
Chart size
Can I see the chart sizes?  And how can I see them? Also what binder of yours would fit a dd 36?
Guest |
Very helpful for a large chest
As a transitioning guy with a EE chest it gets hard to find something to wear that can help at all. I have tried other binders but this one has helped the most. Not the most comfortable but for a large chest it's not going to be very comfortable but, all in all, I recommend these to anyone who had a large chest and needs true compression. But don't wear it all the time. I avoid wearing it as often as I can to not cause permanent damage to my body.
Guest |
great!
I ordered the tri-top as my first binder ever. I'm a D (european sizing) and it makes me almost completely flat, I can even wear normal T's and it doesn't look too weird (I ordered an L by the way). Breathing works fine and it's really comfortable. The fabric feels weird to the touch but when actually put on, you don't even notice it. I'm super happy, recommend!
Guest |
Binds well, but...
Binds well, but around the sides (especially the armpit area) it is uncomfortable. It was a bit on the small side, making it difficult to take on and off. I probably just measured myself wrong, though. Besides that, amazing binder!!
Guest |
Fantastic!
This binder is extremely comfortable, and I received it within only three days of placing the order. I am very happy with my purchase!
Guest |
Flat
I was surprised at how this binder mad my chest flat as I have a large chest, DD-Cup's. It is comfortable and easy to breathe in. I will definitely be back to get another one when this one's through.
Guest |
very good
binds me like a baby
Guest |
FTM
I'm buying this binder for a friend for his birthday, and my FTM friend said that this was a safe bet. Hopefully it fits well (had to guess the size), and maybe I'll walk out of this with a boyfriend. ;) Wish me luck!
Carey Anne |
FTM
I'm buying this binder for a friend for his birthday, and my FTM friend said that this was a safe bet. Hopefully it fits well (had to guess the size), and maybe I'll walk out of this with a boyfriend. ;) Wish me luck!
Carey Anne |
Great Compression
The compression of this binder is really great compared to all the ones I've tried, but it is more uncomfortable because of that. Obviously, binding can cause discomfort. The material this is made of tends to lead to a bit more discomfort than the cotton lined binding top on this site.

The same size in the cotton lined version is less restrictive and it feels very natural against the skin. However, the compression isn't as flat.

If you want a binder you can comfortably wear all day, go for the cotton lined version. If the compression is more important, go for the tri-top binder.
Bobby |
Great Compression
The compression of this binder is really great compared to all the ones I've tried, but it is more uncomfortable because of that. Obviously, binding can cause discomfort. The material this is made of tends to lead to a bit more discomfort than the cotton lined binding top on this site.

The same size in the cotton lined version is less restrictive and it feels very natural against the skin. However, the compression isn't as flat.

If you want a binder you can comfortably wear all day, go for the cotton lined version. If the compression is more important, go for the tri-top binder.
Ashley |
Love it
I really love this product but the only thing that I don't like that this product roll up. It flatten the chest.
Nazaire |
Awesome
It was shipped to me in only two days. I literally cried the first time I put it on. I'm finally happy with how I look. Thank you so much!
Mackenzie |
Amazing
I's my first binder and it's amazing! fits very well and so comfortable. I will order another one in the future for sure!
Ilaria |
Feedback for Trans males
This is great if the longer version makes it difficult to move your waist around or sit down. It's closer to a sports-bra cut length if your chest is around a C-cup (Compresses it down to a large A-cup or small B-cup) Wear baggy, collared, and non-skin tight shirts to avoid chest detection. Overall, a great product for daily use.
Alex |
Perfect
As a transboy and cosplayer, I use the tri top chest binder to bind my chest. It's perfect! It's very easy to put on and to take off, and it's also very easy to look after. The material is easy on the skin, exempt around the shoulders as it can cut in sometimes (but that was my fault, as my binder /was/ crooked). Other than that, and the fact that due to my skinniness, the bottom of the binder pokes out a little, it's perfect ad I really recommend this for anyone looking to compress their chest!
Tawny |
Amazing
This is my first binder, and it's amazing! A bit difficult to get on to begin with, but it's not like I couldn't get it on myself  and I've heard that once you break it in you can pull it down over your head. I'm a b/c cup with a really large ribcage, and it works brilliantly - obviously I'm not completely flat because well, not even any guy truly is, but it looks like I have a guys chest with pecs :D with my guy tshirts on you wouldn't even know! Doesn't hurt at all and is stretchier than you'd thunk
Shelbey |
Couldn't be happier
I ordered this on Friday and it came on Monday, fantastic service considering I live in Ireland! As for the fit, I measured to be 31" and so I ordered the medium, it fits perfectly and isn't too tight but binds well! Couldn't be happier, will definitely be ordering another
CHARLES |
Couldn't be happier
I ordered this on Friday and it came on Monday, fantastic service considering I live in Ireland! As for the fit, I measured to be 31" and so I ordered the medium, it fits perfectly and isn't too tight but binds well! Couldn't be happier, will definitely be ordering another
Sandra |
My binder
This was my second binder and I found it much better than my first as it does not show up underneath my clothes, and does a better job at making me flatter. It is a little uncomfortable around the edges but not too bad, overall, very good binder.
Tyler |
My binder
This was my second binder and I found it much better than my first as it does not show up underneath my clothes, and does a better job at making me flatter. It is a little uncomfortable around the edges but not too bad, overall, very good binder.
Alicia |
WOW
This is my first binder & though a little hard to get on its very effective. I've never felt so good :). its great quality. i love it!
Ryan |
Using Them Daily
Non-binary female here. After using the Ultimate Compression Tank for a few months I came back to try something else. Ended up with two Tri-Tops that I love to no end. I rotate them and wear them almost every day, on in the morning, off when I get home. They don't get me completely flat but better than I hoped for/ (The fat has to go somewhere, can't just disappear.) Having the torso not constricted makes breathing easier, and boy are they durable. I washed them by hand for the first few months but gave up and threw them in the laundry. It is NOT recommended, but doesn't seem to damage them. There was also an incident with duct tape where I had to be cut out of my clothes. The Tri-Top I was wearing has a small, inch long cut down the center of the back which I thought would destroy the whole thing but it didn't. It didn't even fray at the edges and I still use it all the time. I came back online to buy a third one today, among other things. (Using 2 for over a year makes cleaning them, uh....)
Also, The white looks nice at first but it will fade to gray with use. Still is not visible under white shirts though.
Roan |
tri-top chest binder
Looking to flatten my chest, as a woman I ordered my first chest binder here and I am more than impressed! I ordered size XL as my bust is 36" and a 'c' cup range. This chest binder is so comfortable and easy to put on! It flattens my breasts out enough to make me happy to look  down and not notice them as much. This product is fantastic and I plan on buying a couple more in the future!!! 2 thumbs up!!
Jean |
Highly Recommend
The delivery was incredibly speedy, even just for regular postage, and although a little awkward to put on, it's incredibly comfortable and I feel so pressure what's so ever and I'm incredibly pleased with it, no faults at all !
Jennifer |
Best binder so far
i bought this one a month ago to see if i liked it and i love it. comfortable fit , doesn’t slide up while wearing it, fit under clothes very well. i wanted to buy 3 more but i wanted to buy one white and two black but it wont let me split the color in one purchase. is there a way to do that without making two purchases because then i lose the discount. thanks!
chase |
FTM! Amazing!
Amazed at how fast it got to the UK! I ordered it on Thursday the 7th and it came on Saturday the 9th! After putting it on i am amazed at how comfortable it is! I considered getting a size smaller and i am glad i didn't! As an FTM this has eveything i am looking for in a binder! It rubs my armpits a little bit but that should go away after a few days of wearing it!
To anyone considering buying this i would go for it! It is definitely worth every penny!!
Richard |
Really Nice!
While a little loose under boobs and around the neckline (it can scratch a bit), it does a really good job of making me look practically flat, especially when i wear a t shirt over it. I'm a 32H cup(usa sizing)and ordered a large! I think it might fit better on ppl w/ wider waists though.

I am ordering more for my young sister and her friend!!!

Also: the ""nude"" beige is *very* light and more yellow tinted than the swatch.
brittany |
Good binder
This is a pretty good binder. When I first put it on, I was freaking out because it got stuck half way down my shoulders. I find it's easier to put this one on from above your head rather than sliding it up. the only problem I have is it keeps rolling up so I have to discretely push it back down again. also, I do have a bit of a tummy so the bottom of the binder pushes it out. But overall, it flattens my chest well.
ann |
Great binder
This was my first binder.
I got 38C
It does ride up. Obviously depending on how big you are.
It does the job however after a few wears i saw that the collar on the front was sticking out. And it was somewhat obvious when i was wearing a shirt over. you could see the collar sticking out.
other than that i love it.
Joseph |
Does a very good job
Shipping internationnally cost a leg but it came really fast and it does a wonderful job.
There is nothing left of my C-cup chest and the material gives a good silhouette, while actually NOT preventing me from breathing, which is perfect.

The only flaw would be that the material being rather stiff, the hems can easily show if you have small shoulders and a small waist. It's not so bad, but if you're really afraid that people might guess something is under your shirt and have that morphology, you should probably wear an undershirt, or see what helps preventing that.
Gaëlle |
Tri top
Just received my second tri top in the post.
Binds well and is very comfortable , I normally don't even notice I'm wearing it. If you're looking to buy your first binder, this is the one I would recommend.
Extremely fast delivery and all round a great service.
Julie |
Tri top
Just received my second tri top in the post.
Binds well and is very comfortable , I normally don't even notice I'm wearing it. If you're looking to buy your first binder, this is the one I would recommend.
Extremely fast delivery and all round a great service.
Donna |
Wonderful!
Binds very effectively, even for me as a large-chested trans man. Comfortable once its on, though it can be a struggle to get it on, though it's easy enough to take off.

Postage was really quick. I live in Australia and recieved the binder four days after I put the order in.
Julian |
Wonderful!
Binds very effectively, even for me as a large-chested trans man. Comfortable once its on, though it can be a struggle to get it on, though it's easy enough to take off.

Postage was really quick. I live in Australia and recieved the binder four days after I put the order in.
Breanne |
Perfect!
This is my very first binder! I have a small-medium breast size and I got size small and it works perfectly! I had trouble getting it on at first because it doesn't latch on the sides, it's sewn together. I didn't expect that. But it binds pretty much completely flat and doesn't restrict breathing! It's high around the neck, so no lower tshirts. I got nude, and in the picture the material looks strange, like fabric but it's actually a trampoline type feel. Very satisfied with this purchase.
tabatha |
Perfect!
This is my very first binder! I have a small-medium breast size and I got size small and it works perfectly! I had trouble getting it on at first because it doesn't latch on the sides, it's sewn together. I didn't expect that. But it binds pretty much completely flat and doesn't restrict breathing! It's high around the neck, so no lower tshirts. I got nude, and in the picture the material looks strange, like fabric but it's actually a trampoline type feel. Very satisfied with this purchase.
True |
Good FTM binder
I've had 2 other binders in the past and have been double binding for a year and a half, this binder binds better than that and is more comfortable. The only problem is that it sticks out on the bottom, the collar is really high up ( so you cant wear tank tops or low shirts) and the fabric under the arms will give you a small rash.
Liz |
Awesome!
The Binder fits great and it came very fast. I was really happy with the fit, though it is hard to get on at first :)
Dylynn |
Used for 3 years
Ordering yet another one, this is the only style and brand I will wear. Very comfortable (well, as comfortable as binding your chest down can be). Would recommend to anyone. Shipping is quick and painless, too.
Keren |
Used for 3 years
Ordering yet another one, this is the only style and brand I will wear. Very comfortable (well, as comfortable as binding your chest down can be). Would recommend to anyone. Shipping is quick and painless, too.
Alan Otto |
Absolutely the best
I've been wearing this style for years and it is by far the best thing I've ever come across.
Makes me flat as a board, can still breath freely (but running isn't very fun).
Err on the small side if you're close.
Gwendolyn |
Absolutely the best
I've been wearing this style for years and it is by far the best thing I've ever come across.
Makes me flat as a board, can still breath freely (but running isn't very fun).
Err on the small side if you're close.
Sam |