Only the originals will do who needs a lsquosort ofrsquo thermal sock the average thermal sock has a tog rating of just 15 but with a proven thermal tog rating of 234 heat holders can truly lay claim to being the ultimate thermal socksheat holders are made using heavy bulk yarn extra long terry cushioning and an intense brushing process that combine to hold more heat in for longerthese striped heat holders have all the great qualities that have made them such a success but with an