Hit the links with style and purpose in the Under Armour Boys' Performance 2.0 Polo Shirt. Crafted with polyester, elastane and 4-way stretch fabric, this short-sleeve polo boasts ultrasoft, lightweight comfort and flexible performance. The moisture-wicking and anti-odor technologies keep you dry and feeling fresh, while the UPF 30 technology helps you stay protected from the sun's harmful rays. Performance fit.