Mountain Tek Men's Extreme Base Layer Bottoms

Crafted with our Thermotech® Technology, Mountain Tek™ is built from passion and expertise to outfit your cold-weather adventures. Our high-quality, affordable basics keep you warm and comfortable, so your snowy escapes are about making memories, not battling the cold. Whether it's your first trip to the mountains or a family tradition, trust Mountain Tek™ for top-quality base layers designed for peak performance.


Built for the coldest conditions, these heavyweight microfleece bottoms provide warmth, flexibility, and durability. The brushed interior is soft against the skin, while the smooth exterior ensures easy layering. Acclimate Dry+ technology wicks moisture, and odor-blocking properties keep you fresh. Features plush elastic for a secure fit, overlock construction, and an active fit that moves with you.