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 ThermaskinTM Heat Pants also have a touch of stretch to keep up with active pursuits. Styled with an easy elastic waist, plus wide cuffs to help seal out cold. 94% polyester/6% spandex. Machine wash. Imported.