Exclusive UA Scent Control technology lasts longer and works better, keeping you undetected. 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, keeping your thermal underwear fresher, longer. Smooth, chafe-free flatlock seam construction. 4.7 oz. Polyester/Elastane. Imported.