These heavyweight RedHEAT EXTREME men's base layer ankle-length bottoms live up to their name with optimal body temperature regulation. The innovative technical fabric of these thermal long johns stores and manages body heat through carbon microcrystals for maximum comfort in extreme conditions. Thanks to the RedHEAT superior moisture management, this snowboard base layer guarantees the most enjoyable experience for any winter sport. Thick and comfy, they’re the perfect ankle-length base layer pants.