Full protection, features 50+ UPF fabric which block 98% of UV rays. This flap hats will protect your ears, neck and the back of your head from the scorching summer sun. Made of quality polyester which is lightweight, quick-drying, foldable, water and stain resistant. The mesh side panels allow ventilation which makes your head breathable in sunny with strong sunshine. One fits all, adjustable back band (22-24inches) and chin strap provide a comfortable fit and keep your hat from being blown away on windy days. Whether you are out walking, hiking, fishing, playing golf, gardening, sightseeing, on the beach, at a ball game or working outdoors, this hat has you covered.