NIKE Pro Hyperwarm Graphic Arm Sleeves (1 Pair, XS/S, Black/White) 58% Polyester / 28% Spandex / 3% TPU / 3% Elastine Brushed fabric interior feels soft against your skin and helps you stay warm 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