HUE Women's Ergonomic Hidden Cotton Liner (Pack of 3) 50% Nylon, 44% Cotton, 6% Spandex Imported Machine Wash Ultra low profile shoe liner with seamless construction Silicone on the heel, keeping the socks in place for all day wear Moisture-wicking capabilities to help keep feet dry and fresh Small/Medium fits U.S. shoe sizes 4-7. Medium/Large fits U.S. shoe sizes 7-10. 3 pair pack