Versatile enough to be worn as an outer or inner layer the Terramar 3.0 Ecolator Mens Crew is the perfect top for all your cold weather endeavors into the mountains or woods. Called a Killer Value in the Winter Outside Magazine Buyers Guide, warmth and layering performance is what the Terramar Ecolator is all about. The high loft grid channels create an ideal microclimate that efficiently traps air and effectively allows circulation. 95% Recycled Polyester / 5% Spandex, Thermoregulation Technology, 4-Way Stretch, High Loft Grid Fleece, UPF Rating 50+, Flat Seam Construction, Stretch Comfort Neck Tape, Rolled Forward Shoulder Seam, Fit: Tight, Warranty: One Year, Wind Protection: Yes, Material: Synthetic, Weight: Mid, Type: Top, Wicking Properties: Yes, Water Resistant: Yes, Recommended Use: Casual, Antimicrobial: Yes, Anti Odor: Yes, Quick Drying: Yes, Moisture Wicking: Yes, Model Year: 2020, Product ID: 589056, Model Number: W8603 010 S, GTIN: 0721357149647