This multi-purpose base layer was built with thermo-regulating insulation, to provide heat retention, specifically for the 10-25 degree temperature range. Odor control technology helps neutralize odor causing bacteria, and moisture management technology helps keep you dry. Crafted with soft active stretch for ease of movement and range of motion. 90% polyester/10% spandex. Elasticized waistband. Keeps you warm in tempratures as low as 10-25 degrees F. Machine wash; imported.