Terramar Sports Men's Ecolator Quarter Zip 95% Micro Polyester and 5% Spandex Made in USA ClimaSense Thermoregulation Technology keeps you comfortable in all conditions - Engineered to adjust to your body temperature - Inhibits the growth of bacteria that causes odor - Fast wicking and drying High grid fleece for warmth and breathability in cold conditions 4-way stretch Heavyweight (3.0) perfect for cold weather activties UPF Rating 50+