Mens Industrial Work Reinforced Toe Boot Socks (Pack Of 6) Cotton, Polyester, Nylon Rib top reinforced socks for industrial wear. Fully cushioned with in-turned welt and terry loop lining for comfort and fit. True heel and toe and smooth toe seam for movement and fit. Size: US 7-13. 55% Cotton, 32% Polyester, 10% Nylon and 3% Elastane.