Free Size Adjustable - fit most for 56-58CM, 22"-22.8", back elastic band and bow tie allows the sun visors adjustable enough to accommodate any big & small heads (adult).
UPF50 - this spf rated visor hat can shade most UV rays, 5" wide brim provides excellent sun protection for face and neck in summer.
Rollup & Packable - you can roll up it with elastic band on bowknot and tuck in away in suitcase, great for cruise, beach vacation and the like. Also it can regain its shape easily, but sometimes you might need steam/ironing machine to reshape it, you can find the instruction from the product images.
Optional CHIN STRAP - the neck cord can protect your hat from flying off in wind during travelling, gardening or beach vacation.
Fashion & Functional Bowktie - cute bowknot allows to keep hair up in ponytail or bun during the summer.