The more consistent your core body temperature, the better you will perform. And thanks to the Active Extreme Crew Neck baselayer from Craft, now you can feel drier, lighter and faster during your cold weather workouts. Fabric is channel-stitched with two cutting-edge polyester fibers which regulate excess body heat and sweat during exercise. Hexa-channel fibers move moisture away from the skin and keep you cool. External hollow fibers isolate and transport moisture to the next layer for dry comfort.