Crushable Summer Sunhat Women SPF50 100% Cotton Safari Beach Bucket Hats 55-59CM 100%Cotton UV Rating Fabric blocks most sun UV rays, wide brim provides excellent shade protection for face and neck. 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. 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. Detachable CHIN STRAP - the neck cord can protect your hat from flying off in wind while travelling, fishing, boating or hiking. Size Adjustable - Medium best fits for 55-57CM 21.6"-22.4"; Large best fits for 57-59CM 22.4"-23.2". With an adjustable velcro tape built inside the sweatband. Easy to Wash - hand wash with cool water; or spot clean; or machine washing on gentle cycle, shape it immediately and then air dry; if wrinkled you can use steam/ironing machine to recover it.