Alpinestars SM3 Radium Helmet - Black / White

The S-M3 helmet is engineered for MX, Enduro and Off-road use, and features a whole raft of technologies and innovations optimized for ease of use, comfort and impact performance.

• DOT INNER SHELL
• The S-M3 helmet conforms to both DOT certification and ECE 2206 homologation for use worldwide.
• VISOR DETACHING SYSTEM
• PATENTED SYSTEM
• Patented visor release system ensures the visor is released with the correct predetermined amount of force, effectively reducing the forces on the rider’s neck during an impact.

VENTILATION

• Maximized ventilation and high levels of heat transfer exchange thanks to 10 inlets and 7 exhaust ports.

INNOVATIVE FRICTION COATING

• Alpinestars patented low friction coating is applied to the inner part of the main EPS liner to reduce the rotational acceleration forces that can result from certain oblique impacts. This layer essentially acts as a slip plane to mimic the brain’s own low friction cerebrospinal fluid, which is the body’s natural defense against oblique impacts.

LIGHTWEIGHT OUTERSHELL

• This lightweight helmet features a thermo-injected shell incorporating a special polymer blend enhanced by varying degrees of thickness that is engineered to deliver the optimal combination of impact protection and light weight.