This Dri-Duck button down shirt is lightweight and has a vertical vented back with breathable mesh ventilation. It is constructed of strong, flexible fabric that not only resists oil, water, and stains, but offers UPF 50+ protection from the sun's harmful rays. This multi-purpose shirt is enhanced with loads of functional features to keep your necessities safe, clean, and close at hand—roomy chest pockets with flaps, a handy slot for sunglasses, and a hidden microfiber cleaning cloth right inside the hem.