Heat Holders® ULTRA LITE™ thermal socks have been designed to provide our famous thermal protection and comfort in a lightweight profile, ideal for wearing in tighter fitting shoes! Keep feet warm on the coldest of days and pull on this pair of solid colour, lightweight, crew length Heat Holders® LITE™ for men, the warmest thermal sock. Heat Holders® are made from a specially developed heavy bulk yarn which has extreme thermal qualities. The inside of each sock has been intensively brushed that not only feels sensationally soft but also traps warm air close to the skin keeping your feet warmer for longer.