These aren’t your grandpa's long underwear. UA took the thermal and rebuilt it to work for athletes that take their game off-road. The unique negative grid traps monster warmth without adding excess weight and the smooth exterior allows easy layering. UA Base™ 2.0 is our most versatile thermal, built for any outdoor athlete. From running to hunting, the hill to the field, UA Base™ 2.0 has you covered with lightweight warmth.
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