The Men's Midweight Stretch Long Sleeve Top from Columbia is designed for cozy warmth for both on and off mountain adventures. This moisture wicking, quick-dry top is constructed with Columbia's Omni-Wick Technology and features Omni-Heat Thermal Reflective designed to trap heat for extra warmth during cold weather activities. 4-way stretch fabric allows you to move freely and ergonomic, flat locked seams keep you chafe free during extended wear. Omni-Heat Reflective Anytime Stretch Jersey - 85% Polyester/ 15% Elastane, Omni-Wick Moisture Wicking, Quick-Dry Technology, 4-Way Comfort Stretch, Ergonomic Seaming, Flat-Locked Construction, Fit: Tight, Warranty: One Year, Wind Protection: No, Material: Synthetic, Weight: Mid, Type: Top, Wicking Properties: Yes, Water Resistant: No, Recommended Use: Snow, Antimicrobial: Yes, Anti Odor: Yes, Quick Drying: Yes, Moisture Wicking: Yes, Model Year: 2022, Product ID: 543139, Model Number: 1638591010 S, GTIN: 0888664347262