The Explorer UPF 50+ sun hat is ready for any adventure. With a floating microfiber brim, it's perfect for fishing or kayaking. There’s no adventure this hat can’t handle. Its wide, microfiber foam brim allows the Explorer sun hat to float in the water, making it perfect for fishing or kayaking through the rapids. This packable boonie UPF 50+ sun hat is lightweight and has an adjustable chin strap, so it never flies off on windier days. Sun Protection UPF 50+ fabric blocks 97.5% of ultraviolet rays, according to the Australian Radiation Protection Agency. Fabric & Features Brim Size: 3" Crown Size: M/L (59 cm) and L/XL (61 cm) Adjustability: Inner drawstring adjusts fit Fabric: 100% microfiber Additional Feature: Chin strap provides extra wind resistance Wallaroo hats do not feature a built-in magnet for emblems. Packing & Care Care: Hand wash cold Packable: Pack Flat - Place flat in suitcase and gently flatten the crown. Do not crease, do not roll. Size Head Size Centimeters M/L 7 3/8and three eighths 59 L/XL 7 5/8and five eighths 61