Under Armour Apparel Size Chart The Vanish Seamless Shirt brings comfort to athletic apparel. Using levels of mesh mapped to your body, you get incredible ventilation, plus the comfort of fewer seams. It's pretty much the most comfortable thing you'll ever train in. Features: - Fitted: Next-to-skin without the squeeze. - Soft knit fabric with engineered mesh ventilation, mapped to the places you need it most - Nearly sew-free construction to eliminate chafing - 4-way stretch construction moves better in every direction - Material wicks sweat & dries really fast - Anti-odor technology prevents the growth of odor-causing microbes - 64% Polyester/26% Nylon/10% Elastane - Only available to ship within the USA