Flyweight Shirt with Vented BackThe Flyweight Shirt is one of our lightest and most breathable shirts, designed for any warm - weather outdoor activity. An ultra - lightweight 100% polyester construction is designed to dry quickly and wick moisture away from the body. Also contains Sol - Shield UPF 50+ sun protection, vented mesh back & vertical chest pockets. Features100% ultra - lightweight polyesterSol - Shield UPF 50+ sun protection | Drake Flyweight Button - Up Shirt, TEST