Full terry cushion with enhanced durability. Advanced Japanese-designed thermal yarn, providing performance insulation with moisture-breathing abilities and softness. Knitting technology produces medium long loop cushion pile to hold more warm air, increasing the tog. Brushing process maximises the amount of warm air held inside each sock for warmth and all-day comfort. 91% Acrylic / 5% Nylon / 3% Polyester / 1% Elastane Perfect for Cold Weather Machine Washable Cotton Open Cuff TOG Rating 2.3 Classic Rib Welt for Comfort 91% Acrylic / 5% Nylon / 3% Polyester / 1% Elastane Perfect for Cold Weather Machine Washable Cotton Open Cuff TOG Rating 2.3 Classic Rib Welt for Comfort