what's it do?
These aren't your grandpa's long underwear. The patented negative grid traps ridiculous warmth without adding excess weight. UA Base 3.0 is heavyweight protection in a lightweight layer. It provides superior warmth for times when you know you'll need it.
Fitted: Sits close to the skin for a streamlined fit without the squeeze of compression.
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
7.0 oz. Polyester/Elastane