The Ultimate Thermal Socks - Made by US! 100% Genuine Heat Holders When temperatures fall, feet can be the first to suffer. To be confident in the cold, a sock with High Insulation is required. HEAT HOLDERS have been tested to achieve a Thermal tog rating of 2.7. Our unique 3 stage process using Heavy Bulk Yarn, Patented Knitting Technology and Intensive Brushing holds more warm air close to the skin, Ensuring feet stay Warm for Longer! Wool Rich Thermal Yarn Long Looped Pile Soft Brushed Inner Over 8x Warmer than a basic cotton sock! Size - 6-11 uk, 39-45 eur, 7-12 usa Please See Our Shop For Other Sizes, Colours and Styles