These men’s merino wool socks are available in multiple colours. Also available in ladies colours and sizes. Merino Wool - Combined natural heat retaining and wicking properties of merino wool, with the knitting that makes Heat Holders so warm. Reinforced Heel & Toe - To provide extra cushioning and durability, a reinforced heel and toe have also been added to the sock. 2.9 TOG - These socks have a tog rating of 2.9 TOG, making them over 8X warmer than basic cotton socks. Loop Pile & Brushed Inner - The longer looped pile and soft brushed inner make sure to hold heat and cushion feet for all-day warmth and comfort.