All the same warmth as the original Heat Holders Crew sock, but with the addition of wool. Thick, chunky, and with a massive tog rating of 2.7, these Mens Wool Socks are for those who love the traditional weight and feel of 'proper' wool boot socks, but also want the heat retaining and wicking properties of natural wool along with the modern fibers and innovative knitting technology of Heat Holders. With long pile cushioning, these thermal socks will help keep feet fully comfortable and supported. The inside of each sock has been intensively brushed so that it not only feels sensationally soft, but also traps warm air close to the skin keeping your feet warmer for longer. Heat Holders are non-binding, are diabetic friendly, and provide relief for cold feet due to circulation problems.