Let me start by saying, this vest is TIGHT. Like, 'did-I-accidentally-order-my-little-brother's-size?' tight. But that's kinda the point, right? The compression is no joke - it flattens my chest and stomach instantly, giving me that toned look under shirts. I wore it under a fitted tee to a date, and my confidence was through the roof!

The material feels surprisingly soft against the skin though. It's breathable enough for gym sessions, but I won't lie - the first few wears felt like being hugged by an overenthusiastic python. After about a week of gradual wear (start with 2-3 hours/day!), it molded better to my body.

MAJOR WARNING about sizing: Order AT LEAST one size up! I'm usually Medium in everything, but needed Large here. The shoulder straps can dig in initially, and yeah - putting it on requires some creative contortionist moves (step into it like a skirt unless you want to dislocate something).

Biggest pro? Zero roll-up during workouts! Unlike cheaper shapewear that bunches up, this stays put during deadlifts and even swimming. The armpit fat control is impressive too - no more 'side boob' in tight polos.

Downsides? The neckline seams sometimes peek out under thin shirts (annoying for $30+). Also, while it visually slims immediately, one sweaty guy at my gym thought it was a rash guard and complimented my 'dedication' - awkward!

Final verdict? Not magic (still need diet/exercise), but as a quick confidence booster or for hiding gynecomastia? 8/10. Just size up, be patient with the break-in period, and maybe buy two since washing turns white ones cream-colored apparently!