1Storm Motorcycle Street Bike Dual Visor/Sun Visor Full Face Helmet Mechanic with LED Tail Light: LED_HJK316 Size:S( 20.9/21.3 Inch ) M 23 21 17 34

M                              23                        21                  17                        34

Advance Dual Visors/Double Shields Design (inner smoked lens and optional outer clear

Manufacturer Part Number: KT828

XL                              26                        22                  18                        38

1Storm Motorcycle Street Bike Dual Visor/Sun Visor Full Face Helmet Mechanic with LED Tail Light: LED_HJK316 Size:S( 20.9/21.3 Inch ) M 23 21 17 34Features Helmet comes with LED Tail Light; Advanced Dual Lens & Quick Release Buckle Design; Light Weight Durable Aerodynamic Thermoplastic Alloy Shell; Beautiful Glossy UV Protective Finish; Removable and Washable Padding; DOT Approved; Technical Details Brand: 1Storm Model: LED_HJK316 Shipping Weight: 4 pounds Manufacturer Part Number: LED_HJK316 CAPA Certified: DOT Certified Helmet Size Tips (1)Wrap a measuring tape around your head about a half