Underworks Heat Bods™ Thermal Insulated socks are made of extra thick yarns that trap heat near the skin for unrivalled warmth and comfort.
TOG is a unit of measurement used to calculate warmth, and the rating of these Sherpa Lined Heat Bods™ is 4.0 TOG, compared to cotton socks that rate about 0.5 TOG. That makes Sherpa Lined Heat Bods™ over five times warmer, and their extra thick, super soft & cosy lining makes for extreme comfort!! With non-skid grip on the sole they keep feet comfy on couch days too!