SockShop Kids' 4 Pair Marvel Comics Hulk, Spiderman, Ironman & Wolverine Mix Socks 5.5-7.5 Multicolored Sock 1: 68% Cotton 24% Polyamide 7% Polyester 1% Elastane; Sock 2 & 3: 68% Cotton 27% Polyamide 4% Polyester 1% Elastane; Sock 4: 65% Cotton 33% Polyamide 2% Elastane Imported 4 Pair Pack Standard tops Standard toes Machine washable Please note: sizes are U.S. sizes