Northern Hunting K400 Warm Hunting SocksNorthern Hunting K400 Warm Hunting Socks K400 are all round socks, suitable for temperatures down to 5C. They feature breathable material on top and is enhanced with polypropylene reinforcements for superior thermal insulation and a length reaching below the knee. Explore our range of K series socks for options tailored to your specific temperature requirements. To see more from Northern Hunting, visit the Northern Hunting Collection