What's it do? The more you sweat, the heavier most shirts get. UA Vanish is light, extra stretchy, breathable, and fast drying so you can work hard without getting weighed down. It's everything you need to eliminate distractions. Product DNA - Lightweight knit fabric is breathable & ultra comfortable - Material wicks sweat & dries really fast - 4-way stretch material moves better in every direction - Body-mapped, open-hole perforation for added breathability & ventilation where you need it most - Generous dropped armholes for full range of motion - Odor control technology minimizes odor - Loose: Fuller cut for complete comfort. - Style #: 1386800 - 85% Polyester/15% Elastane - Imported