Only the originals will dooften imitated yet to be equalled heat holders are the original tog rated thermal socks the ultimate in warmth and softness and now in a range of bright fun striped patterns tooheat holder thermal socks have a massive tog rating of 234 made with a specially blended heavy bulk yarn that is then intensively brushed ensuring that the soft inner pile traps warm air close to the skin which keeps your feet warmer for longer you wont find a warmer more luxuriou