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.

THE FUNDAMENTALS
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
Raglan sleeve construction and flatlock stitching allow a full range of motion without chafing
7.0 oz. Polyester/Elastane
Imported