The Men's Smartwool Intraknit Merino 200 Pattern Bottom is a lightweight, performance-oriented layering piece. Merino wool and polyester combine to create merino sport yarn that offers warmth, durability and fast dry times. You will stay dry and comfortable thanks to the mesh ventilation in gender specific zones throughout the pant. The Intraknit Merino 200 Pattern Bottom is rounded out with 3D mapping and to offer a custom fit and top-notch freedom of movement. 53% Merino Wool, 45% Polyester, 2% Elastane, Merino Sport Yarn - Power of Merino, Durability + Fast Dry Times of Polyester, Engineered Construction Using Knit Structures - Enhances Performance w/ Lighter Weights + Cleaner Finishes, Mesh Ventilation - Gender-Specific Zones, Keeps Body Dry + Comfortable, 3D Mapping - Near Custom Fit, Freedom of Movement, Fit: Tight, Warranty: One Year, Wind Protection: No, Material: Wool/Synthetic Blend, Weight: Ultra Light, Type: Bottom, Wicking Properties: Yes, Water Resistant: No, Recommended Use: Snow, Antimicrobial: No, Anti Odor: No, Quick Drying: Yes, Moisture Wicking: Yes, Model Year: 2021, Product ID: 619376, Model Number: SW019287F22-M, GTIN: 0193392674383