Under Armour Men's UA Member's Bounce Polo T-Shirt Polyester/Elastane Smooth anti-pick, anti-pill fabric has a cleaner, snag-free finish. 4-way stretch fabrication allows greater mobility in any direction. Moisture Transport System wicks sweat away from the body. Anti-odor technology prevents the growth of odor causing microbes. 30+ UPF protects your skin from the sun's harmful rays.