Under Armour Gameday Tech MTO short-sleeve tee is 100% polyester. UA Tech fabric is quick-drying, ultra-soft & has a more natural feel. Moisture transport system wicks sweat & dries really fast. Anti-odor technology prevents the growth of odor-causing microbes. Set in sleeve construction for comfort and mobility. Curved hem with a slight drop tail. This will instantly become your favorite workout tee simply because it is training gear: loose, light, and it keeps you cool. It's everything you need. Get one today, and see how different your workout experience will become.