41% Cotton, 41% Acrylic, 15% Polyester, 3% Elastane. Natural thermo regulating properties. Ensures foot is well insulated. Fully cushioned foot base protects the skin from friction & cold. Reinforced toe and heel for use with steel toe boots. High stretch top for ease of wear with minimal compression. Machine washable at 40 degrees. Black/Grey with contrast logo. 2 pair pack. Ref: UTFS377