Fabric:45%cellulosic fibre/55%polyester packable & spf Foldable & Packable – The CRUSHABLE bucket sun hat can be folded up quite small to fit your suitcase or handbag for beach holidays, cruise, travel, safari or other summer outing. DETACHABLE CHIN STRAP: adjustable for a better fit; won’t blown off when it gets windy. FREE SIZE: an adjustable tape built inside the sweatband. Best fit for 56-57.5cm 22-22.6 7- 7 1/8. VENTILATED: perfect for beach vacation, also great for summer rides, fishing and hiking. WIDE BRIM: measures 3.7 in length, not only looks stylish, but also wide enough to shade uv rays effectively.