Men&';s Burton Heavyweight X Base Layer Pants The Men&';s Burton Heavyweight X Base Layer Pants deliver serious warmth and breathable comfort for the coldest days on the mountain. Built with heavyweight 300 fleece and Burton&';s Living Lining technology, these base layer pants help regulate body temperature as conditions and activity levels change. Four-way stretch fabric provides unrestricted movement, while quick-drying performance and a stink-resistant finish keep you comfortable through long days of riding. A convenient stash pocket keeps your phone or other small essentials close at hand. Product Details Fit: Slim fit sits close to the body while allowing freedom of movement. Material: Heavyweight 300 fleece with four-way stretch fabric. Warmth: Heavyweight insulation designed for cold-weather layering. Temperature Regulation: Burton&';s Living Lining technology helps release excess heat when warm and retain warmth when cold. Stretch: Four-way stretch construction allows unrestricted movement on the mountain. Breathability: Highly breathable fabric helps manage excess heat and moisture. Quick Drying: Quick-drying construction helps keep you comfortable during extended activity. Odor Control: Stink-resistant finish helps reduce unwanted odors. Storage: Convenient stash pocket for a phone or small essentials. Sustainability: bluesignA(R) product certification supports reduced environmental impact during manufacturing.