Nike Womens Pro Graphic Arm Sleeves 1 Pair, M/L 40% Polyester Dri-FIT fabric to wick sweat away and help keep you dry and comfortable Nike PRO elastic band provides secure fit Thumbholes for enhanced fit and warmth Hidden pocket on inside left sleeve for discrete storage Heat transferred NIKE graphic Contents: 40% Polyester, 20% Spandex, 20% Nylon, 20% Rubber