FEATURES - #1 Selling Work Sock style in America - Soft, breathable moisture control fibers - Arch compression support & stability - Ventilation channels enhance air flow - Comfortable full cushion foot - Durable reinforced heel & toe FIBER CONTENT: I11750; 73% Cotton, 21% Polyester, 4% Spandex, 2%Nylon; Grey: 66% Cotton, 32% Polyester, 2% Spandex;