1STORM Motorcycle Bike Full FACE Helmet Mechanic MATT Black; Size M (55-56 cm 21.7/22.0 Inch)
Brand: 1Storm
Color: 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 23.2/23.4 Inch
XXL 61-62 CM 23.8/24.1 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.
Ultra light weight durable aerodynamic thermoplastic alloy shell;
3-level top ventilation control and 5-position ventilation channel;
Heavily cushioned and comfortable interior, Removable and washable
Beautiful glossy UV protective finish;
Aerodynamic rear venturi-effect exhaust spoiler; DOT Approved