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...

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...

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...

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.

HeatGear Armour is UA's original performance baselayer - the one you put on first and take off last. So they made it extra comfortable by wicking sweat and stretching so you can move no matter what.

HeatGear Armour is UA's original performance baselayer - the one you put on first and take off last. So they made it extra comfortable by wicking sweat and stretching so you can move no matter what.

HeatGear Armour is UA's original performance baselayer - the one you put on first and take off last. So they made it extra comfortable by wicking sweat and stretching so you can move no matter what.

HeatGear Armour is UA's original performance baselayer - the one you put on first and take off last. So they made it extra comfortable by wicking sweat and stretching so you can move no matter what.

HeatGear Armour is UA's original performance baselayer - the one you put on first and take off last. So they made it extra comfortable by wicking sweat and stretching so you can move no matter what.

Experience the epitome of comfort and performance with the revolutionary Merino Base Layer Pant by Vertx. The cutting-edge fabric blend combines the finest Merino wool with durable nylon and groundbreaking GM ReRapt technology, all enhanced by the...

HeatGear Armour is UA's original performance baselayer - the one you put on first and take off last. So they made it extra comfortable by wicking sweat and stretching so you can move no matter what.

UA Base 2.0 is built for cold weather and high activity levels. It uses a unique pattern that's designed to trap heat without adding bulk. Think long underwear, revamped for today's top athletes.

Experience the epitome of comfort and performance with the revolutionary Merino Base Layer Pant by Vertx. The cutting-edge fabric blend combines the finest Merino wool with durable nylon and groundbreaking GM ReRapt technology, all enhanced by the...

HeatGear Armour is UA's original performance baselayer - the one you put on first and take off last. So they made it extra comfortable by wicking sweat and stretching so you can move no matter what.

HeatGear Armour is UA's original performance baselayer - the one you put on first and take off last. So they made it extra comfortable by wicking sweat and stretching so you can move no matter what.