The Patagonia Capilene Thermal Bottoms are the perfect lower body layer for any day in the hills. They're warm enough to provide ample heat on those bitter cold days, but are cut properly that they don't create bulk under your shell pants. They layer comfortably over the top of lightweight bottoms if the temperatures hit desperate, and are soft and fuzzy if you're wearing next to skin. The wide waist band offers effective coverage during movement and helps protect from that bone chilling snow-down-the-pants feel. The Patagonia Capilene Thermal Bottoms are a highly versatile addition to any layering system that will make your winter season much more enjoyable. Heavy Weight Insulation, Wide Waist Band, Tapered Legs, Polyester / Spandex Blend, Polygiene Odor Control, Polartec Power Grid Fabric, Fit: Tight, Warranty: Lifetime, Wind Protection: No, Material: Synthetic, Weight: Heavy, Type: Bottom, Wicking Properties: Yes, Water Resistant: No, Recommended Use: Hiking/Camping, Antimicrobial: No, Anti Odor: No, Quick Drying: Yes, Moisture Wicking: Yes, Model Year: 2021, Product ID: 395662, Model Number: 43692 BLK XS, GTIN: 0888336267744