Wallaroo Hat Co Casual Traveler UPF Wide Brim Adjustable Packable Hat Beach Vacation A wide brim for all-around sun protection. Brim Size: 4.5 inches Diameter at Crown : 6 inches Diameter at Forehead: 9 inches Circumference of forehead: 23 inches Color: Natural UPF 50+ fabric blocks 97.5% of ultraviolet rays, according to the Australian Radiation Protection Agency. Adjustability: Inner drawstring adjusts fit Packable: Pack Flat - Place flat in suitcase and gently flatten the crown. Do not crease, do not roll. 100% Polyester Tags: Beach Vacation Pool Resort Travel Spring Summer Activewear Athleisure Sun Protection Utility Minimalist Neutral