Since putting on weight I avoided every family photo. Last weekend, for the first time in four years, I stood in the middle of the picture. My sister even said I looked back in shape.
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Built for men. Craved by women.
Thousands of customers have shared their experience
Excellent 4.8/5 · based on 1,832 verified reviews
It's not just a compression shirt. After wearing it every day for three months my posture has completely changed. My colleagues started asking if I'd joined a gym. A real physical transformation.
For years I kept sucking my belly in during meetings without even noticing. It was exhausting. Since I started wearing FlatCore I don't think about it anymore. My shirts finally fit and I've got my confidence back.
Honestly, I didn't believe it. I've always had a belly and hid it under oversized T-shirts. The first time I wore it, my wife asked me if I'd lost weight. I hadn't changed a thing.
I didn't expect much. But after a month, the way I see myself in the mirror has completely changed. I don't fight my reflection anymore. It's the first time in years I feel comfortable in my own body.
I bought it hoping it would make me look a bit slimmer. A few weeks later, people at work started telling me I looked fitter. The funny thing is I hadn't changed my routine at all.
FlatCore | Men's Compression Tank
$29.99
Real men, real fit
The difference
Why FlatCore and not a normal undershirt
FlatCore
Normal undershirt
Flattens belly and love handles
Does nothing
Firms up the chest
Clings to it
Supports your posture
Does nothing
Invisible under shirts
Often shows
Breathable, moisture-wicking
Gets soaked
Money-back guarantee
30 days
Does nothing
Compared with ordinary cotton undershirts. No specific brand is targeted.
Specifications
FitCompression tank, round neck
MaterialNylon and spandex, breathable knit
ZonesBelly, love handles, chest, back
SizesS to 7XL (110 to 550 lb / 50 to 250 kg)
ColoursBlack, white, grey
CareMachine wash cold (30 °C)
Your questions
Who is FlatCore for?
For any man who wants a flatter belly and a more defined chest under his clothes, without changing his routine: at work, at a wedding, on a night out.
How does it actually work?
Targeted compression zones hold the belly, love handles and chest firmly in place, while the back panel helps you stand straighter. The result is a slimmer silhouette the moment you put it on.
How fast will I see the difference?
Immediately. The shaping effect is visible as soon as you put it on, in the mirror and under your shirt.
How long does shipping take?
Orders ship within 1 to 2 business days. Most orders arrive within 5 to 9 business days, and you get tracking the moment it ships.
Can I machine wash it?
Yes, cold (30 °C). Let it air dry and it keeps its compression wash after wash.
1,832 verified reviews
Mark F.· 2d
Since putting on weight I avoided every family photo. Last weekend, for the first time in four years, I stood in the middle of the picture. My sister even said I looked back in shape.
Daniel B.· 1d
For years I kept sucking my belly in during meetings without even noticing. It was exhausting. Since I started wearing FlatCore I don't think about it anymore. My shirts finally fit.
Matt C.· 3d
Honestly, I didn't believe it. I've always had a belly and hid it under oversized T-shirts. The first time I wore it, my wife asked me if I'd lost weight. I hadn't changed a thing.
Richard M.· 5h
I didn't expect much. But after a month, the way I see myself in the mirror has completely changed. It might sound silly, but it's the first time in years I feel comfortable in my own body.
Steve B.· 1w
Really impressed with the quality. Comfortable without squeezing too much and it makes a visible difference. My shirts fit much better and I feel a lot more confident.
John M.· 12h
I just feel more confident wearing it. I use it at work, at the gym and when I go out.
Rob T.· 4d
Very comfortable and breathes well even in the heat. Holds the belly in nicely. Overall a great tank.
Andrew W.· 2w
I bought it hoping it would make me look a bit slimmer. A few weeks later, people at work started telling me I looked fitter.
Try it with zero risk.
If you don't feel more confident within 30 days, we refund you. Simple returns, no commitment.