Baselayer Bottoms

The Extreme Cold Weather Clothing System, or Gen-III ECWCS is a protective cold weather clothing system created originally by the United States Army Natick Soldier Research, Development and Engineering Center. This system consisted of a parka and...

UA Base 4.0 is built for extreme cold weather and lower activity. It uses a unique pattern that's designed to trap heat without adding bulk. Think long underwear, revamped for today's top athletes.

We all hate it. That stiff, distracted feeling you get when you're out in the cold. That's why, UA built a baselayer that keeps you warm and dry without being bulky or riding up, so you can stay focused all season long.

The Extreme Cold Weather Clothing System, or Gen-III ECWCS is a protective cold weather clothing system created originally by the United States Army Natick Soldier Research, Development and Engineering Center. This system consisted of a parka and...

We all hate it. That stiff, distracted feeling you get when you're out in the cold. That's why, UA built a baselayer that keeps you warm and dry without being bulky or riding up, so you can stay focused all season long.

The Extreme Cold Weather Clothing System, or Gen-III ECWCS is a protective cold weather clothing system created originally by the United States Army Natick Soldier Research, Development and Engineering Center. This system consisted of a parka and...