If you're serious about the outdoors, you know the importance of a good base layer. This high-performance fabric* not only maintains your body's heat but actually generates heat by absorbing body moisture. It also wicks perspiration away from your skin, which is crucial for comfort in cold weather. Our Thermaskin Heat Crewneck also has a touch of stretch to keep up with active pursuits. Wide cuffs keep cold from sneaking in. *Heat technology is guaranteed for approximately 30 washes. 94% polyester/6% spandex. Machine wash. Imported.