ADJUSTABLE: inside the sweatband of bucket hat, built in an elastic-strap for adjusting hat circumference. the largest circumference is 24u0026#34;nFOLDABLE: the edge of the hat brim is supported by soft wire,easy to fold and reshape.nUPF 50+: 4.5u0026#34; wide cap peak can block out almost all solar UV rays,effectively avoid the skin damage.nDETACHABLE CHIN STRAP: can be installed and adjusted as needed for better fit,avoid being blown off by wind.nCHANGEABLE SHAPE: The hat visor can be free changed to the shape you need.n