Heat Holders - Mens Knee High Thermal Slipper SocksHeat Holders understand that their original length Heat Holders weren’t keeping your knees warm. These long socks have the same warmth and comfort as the original Heat Holders® Slipper sock, but in a knee high length, plus non-slip grippers on the bottom to provide better traction on indoor wood or tiled surfaces.Our expert Heat Holders Brushing process maximises the amount of warm air held inside each sock for total warmth and all day comfort. Heat Holders are Scientifically tested to be over 7X warmer than a basic cotton sock! The Tog rating of this sock being 2.34 whilst a basic cotton sock only measures at 0.33 Tog.Thick, chunky and with a massive tog rating, Heat Holders® are made from a specially developed heavy bulk yarn which has extreme thermal qualities. With long pile cushioning, these thermal socks will help keep feet fully comfortable and supported.The Innovative Heat Holders loop knitting technology produces a unique, extra long looped cushion pile to hold in more warm air, increasing the TOG rating. The non-slip grips on the sole of these slipper socks will help you stay safe around the home. The Extra Long Slipper Socks are available in Black and are One Size 6-11 UK. They are made from 91% Acrylic, 5% Nylon, 3% Polyester, 1% Elastane and are Machine Washable.Extra Product DetailsMen’s Heat Holders Long Slipper SocksKnee High Length2.34 Tog Rating7X Warmer Than A Cotton SockSpecial Thermal YarnAnti-Slip GrippersSoft Brushed InnerThick & Warm FibresGreat For IndoorsAvailable In BlackMen’s One Size: 6-11 UKMachine Washable Heat Holders - Mens Knee High Slipper Socks