Mens Cotton Rich Construction Work Socks (Pack Of 6) Cotton, Polyester, Elastane Great quality mens work socks. Comfortable fit. Made with 55% Cotton, 40% Polyester and 5% Elastane. Machine washable. These socks have a reinforced heel for extra durability, a stretch fit to prevent socks from slipping, fully terry cushioned for extra comfort and a comfort toe seam for reduced irritation.