1Storm Motocross Adult Helmet Downhill Mountain Bike Helmet BMX MX ATV Dirt Bike Storm Style HF803; Matt Black

Helmet Size Chart S 53-54 CM 20.9/21.3 Inch M 55-56 CM 21.7/22.0 Inch L 57-58 CM 22.4/22.8 Inch XL 59-60 CM 23.2/23.6 Inch Helmet Size Tips (1)Wrap a measuring tape around your head about a half-inch above eyebrows (2)Take measurement two to three times to pick the largest one. DOT Approved; L (57-58 CM,22.4/22.8 Inch) Light weight durable aerodynamic thermoplastic alloy shell; Heavily cushioned and comfortable interior; Beautiful glossy UV protective finish; Removable and washable padding & Heavily cushioned and comfortable interior;