UA Base™ 3.0 is built to fight the bitter cold without weighing you down. Soft, brushed negative grid interior traps hot air, providing superior warmth. 4-way stretch fabrication allows greater mobility in any direction. Moisture Transport System wicks sweat away from the body. Anti-Odor technology prevents the growth of odor causing microbes. 7.0 oz. Polyester/Elastane. Imported.