Nike Dri-FIT Fly Rise Crew Athletic Socks SX4862-940 27% nylon Dri-FIT fabric to wick sweat away and help keep feet dry and comfortable Left/right specific for an enhanced fit Dynamic arch bridge for a supportive, compression fit Reinforced heel and toe for enhanced durability in high-wear areas Fabric: Dri-FIT 50% polyester/27% nylon/21% cotton/2% spandex