The Alpinestars SM5 Motocross Helmet is purpose-built to deliver optimal protection, lightweight comfort, and enhanced safety for MX and off-road riders. It incorporates advanced material science and design engineering to surpass the latest safety standards.

Advanced Construction and Impact Protection 

The SM5 features a meticulously engineered structure designed to manage energy from low, regular, and high-speed impacts.

• Thermo-Injected Shell: The helmet utilizes a thermo-injected shell made from a special polymer blend with varying degrees of thickness. This construction is engineered for an optimal combination of impact protection and lightweight performance.

• Multi-Density EPS Liner: The inner shell features a five-density EPS liner, ensuring the correct material density is strategically placed in the correct area for superior impact absorption.

• Revised Volume for Fit: The lower shell volume has been revised on sizes Medium, Large, XL, and 2XL to be approximately 3% wider. This enhancement makes the helmet significantly easier to put on and take off.

• Collarbone Protection: Includes an engineered raised area with padding that effectively reduces forces transmitted to the collarbone. The redesigned chin bar profile is sculpted to provide a relief section, with a softer EPS liner that extends beyond the shell to further mitigate collarbone injury risk. 

• Patented Visor Release System: Features a patented system that ensures the visor is released with a precise, pre-determined amount of force, regardless of the angle of impact.

Exceeding Safety Standards (ECE 22.06 Homologation) 

The SM5 helmet is certified to meet and exceed the rigorous new ECE 22.06 standard, offering enhanced protection across all speed ranges.

• Superior ECE 22.06 Performance:

  • Regular-Speed Impact Rating: Achieves a 44% better regular-speed impact rating compared to the prevailing standard.

  • Low-Speed Impact Score: Provides a 32% better low-speed linear impact score.

  • High-Speed Impact Score: Delivers a 31% better high-speed linear impact score.

• Weight: The ECE version of the SM5 helmet weighs an ultra-light 1,260 grams (Size Medium).

Ventilation and Airflow 

The design maximizes rider comfort through high-level heat exchange and maximized airflow.

• Maximized Ventilation: Achieves high levels of heat transfer and exchange thanks to strategically placed multi-air inlets and exhaust ports.

• Visor-Directed Airflow: The visor is specifically designed to direct air into the internal ports, further enhancing overall airflow and cooling.