The 2.0 Terramar Thermolator Boys Long Underwear Bottoms deliver a generous layer of warmth, extreme comfort and functional needs to adjust to changing weather conditions. The mid-weight fabric is ultra-soft and features ClimaSense Thermoregulation Technology that automatically adjusts to your body temperature. When you are cool it traps air to maintain warmth. When you extend your athletic limitations and your surface temperature increases the fabric allows moisture to escape and maintain comfort. Whether skiing, snowboarding or exploring in cold temperatures the 2.0 Thermolator Pants are mountain ready to function within your surroundings. ClimaSense Thermoregulation Technology keeps you comfortable in all conditions, Fast wicking and drying, Ultra-soft brushed surface traps air, 4-way stretch for ease of movement, Engineered to adjust to your body temperature, Midweight warmth, UPF rating 25+, GTIN: 0721357144017, Model Number: W7539 010 S, Product ID: 411507, Model Year: 2022, Moisture Wicking: Yes, Quick Drying: Yes, Anti Odor: Yes, Antimicrobial: Yes, Recommended Use: Snow, Water Resistant: No, Wicking Properties: Yes, Type: Bottom, Weight: Mid, Material: Synthetic, Wind Protection: No, Warranty: One Year, Fit: Tight