Mens Boot Thermal Socks Yarn - Our Specially developed thermal yarn provides high performance insulation against cold with superior moisture breathing abilities. Loops - Innovative knitting tehnology produces our unique, extra long looped cushion pile to hold in more warm air, increasing the TOG rating. Brushing - Finally, our expert brushing process maximizes the amount of warm air held inside each sock for total warmth and all day comfort. are Scientifically tested to be over 7x warmer than a basic cotton sock Tog rating being 2.34 whilst a basic cotton sock only measures at 0.33 Tog. Boot Socks - These Socks are absolutely perfect for when you have to spend those cold winter days outdoors, whether your in wellies or boots, these socks will fit perfectly.