Baselayer

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.

Compression: Ultra-tight, second-skin fit.

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.

Fitted: Next-to-skin without the squeeze. ColdGear Reactor is intelligent insulation that adapts to your activity level for the right breathability & warmth for what you're doing. 86% Polyester/14% Elastane. Imported.

The Phase 1 Boxer Briefs from XGO are made from a blend of Modacrylic and FR Rayon that meets the ASTM D6413 Standard. These boxer briefs will not melt or drip if exposed to flame. These briefs also feature XGO's Superior Acclimate that will wick...

ColdGear Infrared technology holds in body heat, without adding weight or bulk. It's a special, soft print on the inside and it keeps you warmer, longer, so you can work out in the bitter cold.

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.