Pro-Tect Copper Extreme Fitness Crew Socks - (2) Pair Lycra Spandex throughout the sock to give a Compression feel aiding in muscle recovery TransDry Cotton Wicks Away Sweat And Moisture Keeping Your Feet Dry & Comfortable Copper Oxide Fiber To Stop Odor, Bacteria, And Fungus Sock Size: (M) Shoe Size 6-8.5 (L) Shoe Size 9-11.5 (XL) Shoe Size 12-14.5