This The Bloomerang Performance Polo Shirt by Chubbies features moisture-wicking . anti-bacterial . anti-static . UPF 50+ . and unparalleled breathability. Tailored Fit: Recommend Sizing Up for a More Relaxed Look. This Chubbies The Bloomerang Performance Polo Shirt is made of 90% Polyester . 10% Spandex.