The PolarMax 4.0 Long sleeve Crew Long Underwear Top will keep you warm and dry while cruising down the mountain or relaxing around town. Created with a Polyester blend fabric, this Core 4.0 wicks away the moisture to keep you fresh and dry all day long. The core 4.0 Longsleeve Long Underwear top is perfect for any cooler weather excursions! 4-Way Stretch Fabric, Next to Skin Comfort, Tech Face Finish, Superior Acclimate Dry Moisture Wicking, Fit: Tight, Material: Synthetic, Weight: Heavy, Type: Top, Recommended Use: Snow, Antimicrobial: Yes, Anti Odor: Yes, Quick Drying: Yes, Moisture Wicking: Yes, Model Year: 2099, Product ID: 566084, Model Number: 5P11A 020 S, GTIN: 0785146573532