The Nike Elite Performance socks are sure to become your favorite athletic sock. Built to maximize impact protection to each step these socks feature Dri-Fit fabric that pulls away to help keep you cool and comfortable, left/right specific design for a better fit, arch compression, and a reinforced heel and toe for enhanced durability. The socks are 62% polyester, 21% nylon, 15% cotton, 2% spandex, and are machine washable. Size L fits size 8-12 Size XL fit sizes 12-15 Style: SX369