Under Armour Boys' Performance Blocked Polo Shirt 95% Polyester/5% Elastane Imported Smooth, soft anti-pick, anti-pill fabric has a cleaner, snag-free finish 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 UPF 30+ protects your skin from the sun's harmful rays