Under Armour Women's Eagle Tank 55% Cotton/34% Polyester/11% Rayon Imported Cotton-rich tri-blend fabric has a soft, athletic feel for superior comfort & performance Signature Moisture Transport System wicks sweat so it dries faster than ordinary cotton Anti-odor technology prevents the growth of odor-causing microbes Lightweight stretch construction improves mobility for full range of motion Super-skinny racer back for unrivaled range of motion