SM3 Helmet - Radium

The Alpinestars SM3 Helmet is engineered to deliver an optimal blend of performance, protection, and comfort for MX, Enduro, and Offroad riders. Featuring a thermo-injected shell with a polymer blend, this helmet utilizes varied degrees of thickness to provide high-level impact protection while maintaining a lightweight profile. The construction includes an impact-resistant thermoplastic outer shell and a composite fiber inner layer assembled between the shell and the EPS liner for maximum energy management.

Construction and Impact Management:

• Multiple density inner liner ensures the correct density in key areas for enhanced impact absorption.
• A 6-piece EPS liner with five distinct densities effectively manages volume and impact performance.
• The polished inner EPS liner features a special low-friction coating to reduce rotational acceleration forces during oblique impacts.
• Inner and outer surfaces are specifically engineered to minimize the effects of oblique forces.

Ventilation and Airflow:

• Maximized ventilation with ten inlets and seven exhaust ports for high levels of heat transfer exchange.
• The visor is designed to direct air directly into the ports for enhanced airflow.
• A specialized visor release system ensures the visor detaches with a pre-determined amount of force, reducing potential strain on the rider's neck during an impact.

Rider Comfort and Safety:

• Equipped with an Emergency Release System (ERS) and removable 3D contoured foam cheek pads for safe helmet removal in emergency situations.
• The comfort liner is constructed using recycled materials, supporting a lower carbon footprint.
• Integrated hydration tube channels are built into the cheek pads for convenience during long rides.
• A 25 mm soft textile chin strap with stainless steel D-rings ensures a tight, secure, and comfortable fit.
• The chin area is specifically optimized for superior impact performance.

Designed for riders who demand technical precision and reliable safety, this helmet provides a tailored fit and advanced protective features required for the most demanding offroad environments.