Heat Holders Ultra Lite The Heat Holders ULTRA LITE thermal socks are designed to provide our famous thermal protection without the annoying ‘too thick’ bulk of the original Heat Holders thermal socks. These ultra lite socks are perfect for tighter fitting shoes, meaning they make great dress socks in the winter months, fitting in any sort of shoe and providing Heat Holders known warmth. These Heat Holders Ultra Lite are available in 3 colours; black, purple and indigo. Main Features Heat Holders Yarn - Our advanced Japanese designed thermal yarn provides high-performance insulation against cold, with superior moisture breathing abilities and softness. Heat Holders Loops - Our Innovative knitting technology produces our unique, short looped cushion pile to hold in more warm air, increasing the TOG rating. Heat Holders Brushing - Our expert brushing process maximises the amount of warm air held inside each sock for unbelievable total warmth and all-day comfort. TOG Rating - These socks are scientifically tested to be 3X Warmer than a basic cotton sock, with a TOG rating of 1.04 Extra Product Details Heat Holders Ultra Lite 3 Colours to choose between Ladies socks The thinner version of the Heat Holders original thermal sock 1.04 tog rating Also available in mens sizecolours 89% Acrylic, 10% Polyamide, 1% Elastane Machine washable