Based on the model used to keep U.S. troops cool and protected in sweltering conditions, our Ventilated Booney Hat features screened "port holes" and 360° vents in the outer crown to capture the slightest breath of a breeze. Mesh lining and sweatband feel fresh as you work up a head of steam. Wide 3" brim provides shade anywhere and snaps up on sides when you want it out of the way, while the UPF 50 shields your noggin.