Sunday Afternoons cruiser. M(6 3/4 to 7 1/4) L(7 1/4 to 7 7/8) This sun hat features UPF 50 Supplex® nylon construction, inner Cool Max® brow sweat band, and top-of-crown mesh that keeps your head dry and comfortable. These sun hats also have a spiral stitched 3" brim that holds shape with brim-wire stiffener. Rear external sizing cord and chin strap keeps your sun hat securely on your head. Flexible, sewn in "side stays" allows the wearer to adjust the brim shape. Wash by hand. Packs flat. 50 UPF (mesh vents not rated). Imported. 2¾" front and side brim, 3½" back brim/floatable foam core with poly brim wire UPF 50+ Certified Sun Rating (mesh vents not rated) Strategic Mesh Ventilation Water Repellent/Stain Resistant