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Feature

DOT Approved; M (51-52 CM,19.7/20.3 Inch);
Light Weight Durable Aerodynamic Thermoplastic Alloy Shell
Top and front ventilation control, 3 position ventilation channels;
Beautiful Glossy UV Protective Finish
Removable and Washable Padding

Description

Helmet Size Chart

S 49-50 CM 18.9/19.3 Inch
M 51-52 CM 19.7/20.3 Inch
L 53-54 CM 20.7/21.1 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.