Ecosox Viscose from Bamboo Work Sock 2 Packs 80% Viscose from Bamboo, 10% Polyester, 5% Nylon, 3% Spandex, 2% Rubber Imported Moderate cushioning in ball/heel protects against blisters Arch Support for: better fit, support, fights fatigue Helps control and prevent foot odors Exclusive EcoSox construction wicks away moisture Exclusive Ecosox Thermo-Regulating Properties Regulate Skin Temperature