Trap in body heat in the colder months of the year.Thick and warming for the colder months of the year, Heat Holders Thermal Socks are ideal for wearing when the temperature is low, whether you\'re waking, skiing or relaxing.  Designed with yarns that are tightly woven for extreme warmth, Heat Holders calf-length socks use a pile cushioning to keep you not only warm, but comfortable as well.  Brushed inners and a gripping upper ensures that each Heat Holder sock can keep you protected from cold all day long without slipping down or irritating your skin. Also known as \"The Ultimate Thermal Sock\" Heat Holders original boasts a 2.3 Tog rating, meaning you\'ll never get cold feet again.UK size 6 - 11 (EU 39 - 45)