Fitted fit: 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 fast Reflective logos for greater visibility on low-light runs 110g Polyester Run for mile after mile in the lightweight, comfortable Under Armour Threadborne Streaker Short Sleeve Running T-Shirt. Under Armour's fabric technology wicks away sweat faster and ensures a material that won't cling to you, won't chafe and stretches.