Fitted: Next-to-skin without the squeeze. UA Threadborne Microthread technology in the fabric dries faster, won't cling to you, won't chafe & stretches without absorbing sweat. 4-way stretch construction moves better in every direction. Material wicks sweat & dries really fast. Anti-odor technology prevents the growth of odor-causing microbes. Reflective logos deliver greater visibility on low-light runs.