What's it do?
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? 3.0 is heavyweight protection in a lightweight layer. It provides superior warmth for times when you know you'll need it. On the hill or on the move, when you run cold get the UA thermals that keep you going strong.

THE FUNDAMENTALS

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 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
Smooth, chafe-free flatlock seam construction
Working fly
7.0 oz. Polyester/Elastane
Imported