Fitted: Next-to-skin without the squeeze UA Microthread technology in the fabric dries faster, won't cling to you, won't chafe and stretches without absorbing sweat Moisture Transport System wicks sweat and dries quickly Reflective logos for greater visibility on low-light runs 155g Polyester Engineered for your run, this is Under Armour Threadborne Streaker Long Sleeve Running T-Shirt. Under Armour's fabric technology wicks away sweat and ensures a material that won't cling to you, won't chafe and stretches.