UPF 50+: the wide brim blocks most sun UV rays and provides excellent shade protect for face and neck.
Size Adjustable:Medium best fits for 56-59CM 22"-23.2" It adjusts via inner drawstring sweatband
Crushable & Packable - you can fold or roll-up it and tuck in away in suitcase, great for cruise, outdoor trip, 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.
Detachable CHIN STRAP - the neck cord can cover your hat from flying off in wind while travelling, fishing, boating or hiking.
Wired Brim - there is quality wire built in brim edge to make the wide brim stiff enough to be flipped up or down to adjust the look or coverage.