The Terramar 3.0 Genesis Long Underwear Pant is a warm baselayer designed for comfort. Its midweight 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 aerobic activity rises and the surface temperature increases the fabric allows moisture vapor to escape to maintain comfort. Flat seam construction and a wide waistband prevent chafing and create an ultra-comfortable fit. 100% Polyester, Single Sided Fleece, All Flat Seam Construction, Reflective Logos, Thermoregulation Technology, Smooth Face for Easy Layering, UPF Rating 50+, Wide Waistband for Extra Support and Comfort, Fit: Tight, Warranty: One Year, Wind Protection: Yes, Material: Synthetic, Weight: Mid, Type: Bottom, Wicking Properties: Yes, Water Resistant: Yes, Recommended Use: Casual, Antimicrobial: Yes, Anti Odor: Yes, Quick Drying: Yes, Moisture Wicking: Yes, Model Year: 2020, Product ID: 589064, Model Number: W9042 6078 S, GTIN: 0721357353228