Men\'s Extra Long Heat Holders Heat Holders understand that their original calf length Heat Holders weren\'t keeping your knees warm if you were having this problem then there is no need to worry as these extra-long, knee-high Heat Holders won\'t only keep your feet toasty but will ensure your entire leg is extremely warm too! With a 2.34 tog rating, your feet and legs will stay warm even in extremely chilly winter climates. Heat Holders incorporate revolutionary knitting technologies including the heavy bulk yarn the long piled cushion loop and the expert brushing process which doesn\'t just reach up to your calf but all the way up to your knee. These socks are especially useful for wearing with wellies and boots especially if you find yourself outside for a substantial amount of time. These socks are available in a 6-11 (39-45 eur) and you can pick from 6 different colours.