UA Base™ 2.0 is highly versatile mid-weight protection for colder conditions and a variety of activity levels. Soft, brushed negative grid interior traps hot air, providing superior warmth. 4-Way Stretch fabrication allows greater mobility and maintains shape. Signature Moisture Transport System wicks sweat away from the body. Quick-dry fabrication keeps you light and comfortable. Anti-Odor technology prevents the growth of odor causing microbes. Raglan sleeve construction and flatlock stitching allow a full range of motion without chafing. 4.7 oz. Polyester/Elastane. Imported.