91% Acrylic 5% Nylon 3% Polyester 1% Elastane Machine Washable 1 Pair of Ladies Heat Holders socks! Enjoy the warmth of Heat Holders, in stylish and feminine colours / styles! Choose from a marl colour or bold stripes! Heat Holders Yarn – Our specially developed thermal yarn provides high performance insulation against cold with superior moisture breathing abilities. Heat Holders Loops – Innovative knitting technology produces our unique, extra long looped cushion pile to hold in more warm air, increasing the TOG rating. Heat Holders Brushing – Finally, our expert brushing process maximises the amount of warm air held inside each sock for total warmth and all day comfort. Heat Holders TOG Rating – These socks are scientifically tested to be 7X warmer than a basic cotton sock, with a massive tog rating of 2.3!