Material: Polyester, Plastic ,Metal, Nylon, Fit Head Girth: 34cm--42cm/13"-16.5" * Function:protect you from Rain or Sun, for children or adult use; Keep both hands free while protecting your head. * Direction:Just unfold the Umbrella Hat and push the white short pillar to the top, then put on it. * Advantage:Adjustable headband is suitable;Also features a nylon strap for fixing.