The Sweet Cheeks Infant Socks with are made from a cozy terry blend of 75% cotton, 15% nylon and 10% spandex, the socks are designed to stay up and feature a non-skid sole for safe little steps.a 75% Cotton, 15% Nylon, 10% Spandexa Contrasting Heel & toea Terry loop a " to help stay ona Non-skid solesa Preshrunk