Max Cushion, with full cushioned leg and foot Soft, breathable moisture control fibers 58% Cotton, 40% Polyester, 2% Elastane Hand Wash Only Dri-tech Moisture Control Crew Socks Multipack I611010 Heel lock holds sock in place, best-fit, no slip comfort Arch compression support & stability Ventilation channels enhance air flow Dickies Dri-Tech 3. 0 expands with new Max Cushion. Engineered with added cushion throughout the leg and foot to deliver added comfort in boots and shoes. Heel-lock technology securely keeps sock in place, for best fit and comfort.