Dockers Men's 2 Pack Ultimate Fit - Thermocol Flextemp Split Leg Crew Socks 48% Other Fibers, 32% Cotton, 20% Polyester Imported Machine Wash Flextemp thermo cool temperature regulating polyester yarns Half-cushion for comfort and shock-absorption Arch support helps keep socks in place Mesh ventilation on top of foot for breathability Seamless toe for added comfort. Other fibers include thermocol and lycra