Coolibar UPF 50+ Women's Reversible Pool Hat - Sun Protective 100% Polyester UPF 50+ - protects against 98% of UVA and UVB rays Aqua SUNTECT: Chlorine and saltwater resistant with 4-way stretch; Lightweight, quick drying, and packable Protective 3 1/4 inch brim; 22 7/8 inch circumference; Adjustable Velcro closure at back with ponytail opening Reversible: print one side, solid on other; Hand wash, line dry; Imported Recommended for everyday leisure, and relaxing by the pool, lake or ocean - great for stylish full face and neck coverage