The Under Armour Iso-Chill Polo Shirt is the official tour worn garment of Jordan Spieth. Made from 88% nylon and 12% elastane, the Iso-Chill Polo Shirt is designed to offer maximum ventilation with added comfort. Under Armour moisture transport technology helps keep you keep cool and dry by moving perspiration from your skin to the outside of the garment for rapid evaporation. Coupled with the revolutionary Iso-Chill technology, the fabric has an exclusive coating on the inside that pulls heat away from the body making you feel cooler. The Iso-Chill Polo Shirt is styled with a simple design and a contrast brand logo on the left chest for added style. Under Armour Golf Polo Shirts are designed with a contemporary style to create the very best performance golf apparel for your active lifestyle.