Because of its UPF-50-rated fabric, the Sunday Afternoons Sun Tripper Cap protects your bald spot (or thick, luxurious hair) and face from the sun's harmful rays. The Sun Tripper features a folding brim so you can stash this cap in your back pocket when you don't need it. Mesh venting panels and a wicking sweatband help you stay dry and coolheaded on hot days. A crown pocket holds a credit card and ID or a secret treasure map.