For cold weather, a sock made of wool, IsoWool, shearling, fleece and similar type synthetic materials must be used. The reason these types socks are excellent for winter wear is because if the socks get wet (due to excessive perspiration from the foot), the socks themselves do not lose their insulating properties.
Cotton vs. Merino Wool Socks: When it comes to finding the best socks to keep you warm, merino wool is the better option. Unlike cotton (which retains moisture), merino wool is lightweight and keeps your feet dry while insulating heat. The material is also naturally odor-resistant.Jan 1, 2022