Smooth and sleek HeatGear® fabric is light, durable, and comfortable, so you won"t be weighed down. Lightweight, 4-way stretch construction improves your range of motion and dries faster. Signature Moisture Transport System wicks sweat to keep you cool and dry. Anti-odor technology prevents the growth of odor-causing microbes to keep your shirt fresher, longer. 30+ UPF protects your skin from the sun"s harmful rays. Smooth Flatlock seams prevent chafing. Heat-sealed UA logo and back lockertag. 5.0 oz. Polyester/Elastane. Imported.