UA Microthread technology in the fabric dries faster, won‘t cling to you, won‘t chafe & stretches without absorbing sweat. Material wicks sweat & dries well. Anti-odor technology prevents the growth of odor-causing microbes. Mesh panels for added breathability. Ergonomic shaped hem for enhanced coverage. Classic racer back construction with slightly dropped armholes. Reflective details for greater visibility on low-light runs. Polyester. For Run And Other Sports.