Under Armour UA Vanish Seamless Short Sleeve. Designed for peak performance, this t-shirt features a seamless construction in key areas to minimize chafing and maximize comfort. Engineered with strategically placed mesh ventilation, it enhances breathability where you need it most, keeping you cool and focused. The soft knit fabric offers 4-way stretch for superior mobility in every direction. It also features moisture-wicking technology to keep you dry and odor control to minimize unwanted smells.