Mens XL Ultimate Hard Wearing Big Foot Work Socks (Pack Of 6) Cotton, Polyester, Acrylic Great quality mens work socks. Ultimate work socks with reinforced heel, toe and extra cushioning especially for hard working environments and tough conditions. Ideal for wearing with heavy or steel toe capped safety boots. These socks are full terry cushioned with a high flexible comfort cuff to increase durability and heel protection. Fibre: 52% Cotton, 28% Polyester, 18% Acrylic and 2% Elastane.