Cold feet can sideline even the most steadfast hunters. Complete your late-season system with the Heavy Weight OTC Sock and stay focused in the field through the coldest snaps. Temperature-regulating merino wool is woven with advanced PrimaLoft(R) yarns to lock in heat, and it's reinforced with Cordura(R) at the heel and toe to reduce the strain of demanding pursuits. Performance zones throughout the sock provide a low-bulk fit inside boots without sacrificing warmth or cushioning, giving you comfort for miles.