We made our Perla Packable Wide Brim Hat from a revolutionary polyester straw that offers the look of natural fiber and the durability of iron. Roll it, fold it, crush it, stow it - this beach hat is virtually indestructible. NOT RECOMMENDED FOR: swimming, not chlorine and salt water resistant or water repellent RECOMMENDED FOR: everyday leisure, around the patio, around town or just hanging around, walking the dog, gardening or light yard work FEATURES: Internal sweatband for comfort and a snug fit and crown lining for maximum sun protection; Wide 4 inch brim; Approx. circumference: 22 1/2 inches; Spot clean; Imported DERMATOLOGIST ENDORSED: First company honored with the Skin Cancer Foundation Seal of Recommendation and trusted by top dermatologists COOLIBAR SUN PROTECTION: Leading Sun Protection Company worldwide, guarantees UPF 50+ apparel blocking 98% of UVA and UVB rays.