When temperatures fall, feet can be the first to suffer. Last winter we were at the mercy of the coldest winter weather in more than 30 years according to the U.K Met Office, proving keeping feet warm more vital than ever. Ordinary thermal socks or wearing many pairs of socks will often let you down. To be confident in the cold you need a sock with high insulation. Heat Holders have been tested to achieve a thermal tog rating of 2.34. Our unique 3 stage process using heavy bulk yarn, advanced knitting technology and intense brushing holds more warm air close to the skin, ensuring your feet stay warmer for longer.