Craft Extreme Active underpant allows you to perform optimally in fair and cold conditions. Be active extreme is made of a thin, lightweight and elastic fabric that is channel-stitched with two high-tech polyester fibers. A hexa-channeled fiber against the skin enhances moisture transport, which cools the body down. On the outside, a hollow fiber offers insulation as well as transport of moisture to the next layer. Keeps smell and odor away.