SWITCH TO UNDER ARMOUR FOR YOUR RUNNING GEAR. THE UNDER ARMOUR UA COOLSWITCH RUN SHORT SLEEVE SHIRT.UA CoolSwitch technology incorporates an exclusive coating on the inside of clothing that will pull heat away from your body, making you feel cooler. The Under Armour UA CoolSwitch Run Short Sleeve Shirt uses that technology and a sweat-wicking material to bring you the ultimate running shirt. The UA logo on the front and design on the back of the shirt are reflective, so you can stay safe on your late night runs. FEATURES Fitted: Next-to-skin without the squeeze UA CoolSwitch uses an exclusive coating on the inside that pulls heat away from your skin, so you actually feel cooler Material wicks sweat & dries really fast Anti-odor technology prevents the growth of odor-causing microbes Reflective details deliver visibility on low-light runsErgonomic shaped hem 91% Polyester/9% Elastane