Tactel® inner layer - Wicks away perspiration to the moisture absorbing outer layer, keeping the foot dry Fibres and top venting - Maintains a comfortable temperature for the foot Arch bracing - For additional support Heel Power Technology - Keeps the sock firmly in place Fabric: Outer Layer - 68% Cotton, 30% Nylon & 2% Elastane Lycra®/ Inner Layer - 100% Tactel®