Keeps the sun out and stays cool ・The main body is water-repellent, the brim is light-blocking and heat-shielding, and has UPF 50+ with a 99.9% shielding rate. The waist has slits for excellent breathability, and the lining is mesh, so it's not stuffy. This is a multi-functional adventure hat that can be used for three seasons. The back flap can be stored in the brim when not in use. ▪️100% Polyester ▪️Size: 57.5cm Only worn once for a short time. I will sell it to someone who understands home storage. I will fold it and ship it. UV cut Water repellent Hand washable Chin strap included Breathable Color: Black系 (Black-based) Stains, tears, odors, etc.: None