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🔥 Flatten your chest, elevate your confidence — invisibly.
The Underworks FTM Extreme Tri-Top Chest Binder Top 983 offers powerful chest compression with three medical-grade fabric layers, available in 7 sizes for a precise fit. Designed with a low neckline and flat-stitched shoulders, it remains undetectable under clothing. Made in the USA from a high-stretch nylon-spandex blend, this athletic-fit, sleeveless binder balances maximum flattening with all-day comfort and durability.























| ASIN | B01M2CV9PR |
| ASIN | B07C3GJXLR |
| Age Range Description | Adult |
| Apparel Closure Type | Pull On |
| Apparel Fabric Stretch | High Stretch |
| Apparel Fabric Weight Class | Medium Weight |
| Back Style | T Back |
| Best Sellers Rank | #92,835 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1,409 in Men's Shops #3,144 in Men's Activewear |
| Brand Name | Underworks |
| Collection Name | All |
| Color | Black |
| Cuff Type | No Cuff |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,112) |
| Date First Available | November 2, 2016 |
| Department | mens |
| Fabric Stretchability | Stretchable |
| Fabric Type | 70% Nylon, 30% Spandex |
| Fit Type | Athletic Fit |
| Fit to Size Sentiment | Positive |
| Import Designation | Made in USA |
| Item Length Description | Standard Length |
| Item Weight | 4 Ounces |
| Item model number | 983 |
| Manufacturer | Underworks |
| Manufacturer Part Number | BHBUKPPOAZIN2134 |
| Material Type | Nylon Blend |
| Model Name | Ftm Extreme Tri-top Chest Binder Top |
| Neck Style | Crew Neck |
| Occasion Type | Vacation |
| Pattern | Solid |
| Product Care Instructions | Wash warm, tumble dry low, no bleach, no iron |
| Product Dimensions | 7 x 6 x 0.5 inches; 4 ounces |
| Shirt Form Type | Crop |
| Shoulder to Bottom Hem Length | 13 Inches |
| Sleeve Length Description | Sleeveless |
| Sleeve Type | Sleeveless |
| Sport Type | Exercise and Fitness |
| Style Name | Tri-top Chest Binder Top |
| Style Number | 983 |
| UPC | 846330029560 |
| Unit Count | 1 Count |
| character | sports |
| collar-type | Collarless |
S**K
Great compression, doesn’t lay completely flat
TL;DR: really good budget binder. Even with a larger chest and smaller frame it still does a great job flattening while the bottom edge stays flat on my ribs. Neckline bunches a bit so not for thinner, super fitted shirts **my sizes for reference: 29” ribs, 34” chest and got the Small size** I’ve gone on a binder blitz recently and gotten some from various companies. Honestly I didn’t have high hopes for this one since it was readily available on Amazon and didn’t cost a crazy amount. I’m glad I was wrong. This style (tri top) is the second style I have from Underworks, the first being the econo one (which compresses fine just the cut isn’t quite as precise as this one). I’ll say this was difficult for me to put on. Definitely couldn’t do it still being damp from a shower and I bet it would be hard to get off if I was sweaty. I can certainly feel the compression. I know having bigger boobs with a smaller frame I’m never going to be completely flat, but this gets me pretty darn close. While the bottom edge of this binder lays really flat on my ribs it still bunches a little, but not so much this it’s crazy noticeable through a t shirt (not super fitted). The neckline does bunch a bit more however, so I wouldn’t want to wear it under something very tight or thin. I didn’t do a lot of activity when I wore it but I would say definitely not for a high octane workout, at least if your boobs are that much bigger than your ribs because of the amount of compression. The straps do dig in occasionally on the shoulders but because they’re wider it’s not too uncomfortable until I can adjust it. After putting it on it was a bit of work trying to adjust my boobs only due to the arm holes being smaller (which hides my extra boobs spillage so not a sticking point for me) All in all I feel like it’s a great buy for the price and I’m shocked at the amount of compression I get
M**S
Perfect binder for me
Amazing binder, been using underworks for years. While I do have a small chest la it may not work for everyone. It binds me flat and very natural looking. It feels a lot like a bathing suit and after a bit I don’t notice I’m wearing it. The fit was true to size too.
A**X
NOT DISCREET, but great product
This binder fit really well, I am a 32 C and I am incredibly flat with this on! I really love the product and the material is pretty nice. It’s not very soft, but the panel in the front does its job well. It cuts into my armpits a bit, but not enough to bother me too badly. The neck and straps go kind of high up, so it’s not really suitable for low-cut shirts. That being said, the packaging is not discreet at ALL. Luckily for me, this wasn’t a problem, but something to keep in mind for those ordering. The product came in the original manufacturer’s bag, product label visible, with no shipping pouch or box at all.
A**V
Underworks or gc2b
Ill compare the gc2b binder and underworks for people like me who are wondering if they should get it. I have worn the binder for almost a week now and it's usually on for more than 10 hours (which I definitely do not advise, I have severe rib and back pain from that) First off- shipping was extremely fast, I live in southeast Europe and it came in around 5 days (had to deal with customs but that's because I ordered from the American Amazon like an idiot). You receive what you ordered, an underworks branded binder with the size and colour you chose. The binder itself is made out of some sort of rougher, mesh material, way more rough than the gc2b and slightly longer (I find that more comfortable). It was kind of itchy the first day, but I quickly got used and it doesn't bother me anymore. The shoulder straps and the neckline are more discreet, they're farther away from where your shirt neckline would be, the gc2b are really far up and could be seen under most of my shirts. The straps cause some tension and therefore my shoulders hurt ( kind of like I have sore muscles but that might just be me). Some people say the bottom of the binder rides up, that doesn't happen to me but everyone has a different body so take everything I write with a grain of salt. Lastly- the binder is, from what I can feel, a bit tighter than the gc2b, it does bind better (i have worn the gc2b one for more than a year and it might have been slightly stretched). But since its tighter it also causes more pain. I wear the binder, usually, for more than 10 hours, my back and rib pain has increased and there is added shoulder pain, sometimes it's almost unbearable. Otherwise the binder is perfect, I love it and I will definitely order more.
C**C
Very rough material but binds well
Material is very scratchy and rough. The arm holes are slightly too tight so it rubs up against your armpit and restrsicts your movement a little. The sizing chart is accurate though (my bust size is 39.5 and my band size is 33, I got a large) and it does bind well. It breathes better than my other binders which makes sense since the fabric is sheer. Its tolerable if you're wearing it for a short amount of time. Wouldn't get if you have sensory issues or are prone to chaffing.
K**K
Must Try- Transman Approval
Second time buying and I love it. I have the half and full binder and they get the job done. As a transman and fat these hold me together like a charm. It is tight in the right areas so don’t wear it too long because it will have you short of breath. At first it did dig into my lower back because it has a bit of a length to it but it wasn’t a deal breaker. No funny smell and it’s easy to wash. The material is like a spandex. Not bad.
L**E
Bad customer service
This would have been the third Underworks binder I've bought in 3 years. I'm happy with the quality of the first two I bought. They're easy to breathe in and are overall comfortable for a lot of activities. The problem is I got the wrong size and can't even wear it all. I tried reaching out to customer service for a different size, but they completely ignored what I was telling them and wouldn't do anything to help me. Now, I'm stuck with a binder I cannot wear at all, and wasted money. I'm very unhappy and will not be buying from Underworks again.
J**N
very comfortable and only binder that has worked well for a larger chest 🙌
S**H
Good
M**M
It's best you order a size up and it's hard to get on but once it is it's comfortable,you breath fine and binds amazingly
N**N
I love it
Z**T
I worked well but I no longer need to purchase them
Trustpilot
3 weeks ago
1 week ago