The Men's Smartwool Intraknit Merino 200 Crew is the ultimate performance-oriented layering top. The Merino Sport yarn uses a combination of merino wool and polyester to offer powerful warmth, durability and fast dry times. The engineered construction creates a lightweight garment with clean finishes while the 3D mapping offers a custom fit and top-notch freedom of movement. The Intraknit Merino 200 Crew is finished off with gender-specific mesh ventilation throughout, rounding out a winter ready layering piece. 53% Merino Wool / 45% Polyester / 2% Elastane, Slim Fit, 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, Ribbed Elbows - Added Durability, Fit: Tight, Warranty: One Year, Wind Protection: No, Material: Wool/Synthetic Blend, Weight: Ultra Light, Type: Top, 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: 619370, Model Number: SW019286F22-M, GTIN: 0193392673423