Size Adjustable:Medium best fits for 56-60CM 22"-23.6" It adjusts via inner drawstring sweatband
Detachable CHIN STRAP - the neck cord can cover your hat from flying off in wind while travelling, fishing, boating or hiking.
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.
Breathable & Lightweight - so it does not overheat in the summer, the upf brim can also provide some sun protection during gardening.
UPF 50+: the wide brim blocks most sun UV rays and provides excellent shade protect for face and neck protective