Heat Holders LITE thermal socks have been designed to provide our famous thermal protection and comfort in a medium thick profile, ideal for wearing in casual shoes and boots! Compared to our original, maximum loop length thermal socks, Heat Holders LITE thermal socks have a medium loop length to still be 5x times warmer than a cotton sock but fit better in tighter fitting shoes. These socks suit people who find the average size mens socks to be a bit small!