Penn's Vented Performance Shirts, made from 100 percent polyester with UPF 30, continuously wick away moisture. Additional features include front, underarm and back mesh vents designed for breathability. The rear vent stretches across the entire back of the shirt; underarm vents are discreetly tailored, and the front vents are built into the chest pockets. Light-reflecting pastel color options include blue, yellow and tan. Available in men's sizes M to XXL, the shirts cost $49.99.