The Tech Prism 1/2 Zip Running Tee is designed to keep you warm in cold weather running conditions with a unique hexagonal gird pattern that enhances ventilation throughout. Great for layering up, the baselayer tee is also incredibly lightweight with enhanced sweat-wicking properties that quickly draws moisture away from the skin. Ergonomic thumb loops ensure stay-put coverage while reflective details boost visibility – keeping you seen in low lighting conditions. Care Instructions Machine washable. Do not tumble dry.