ALPINESTARS SM3 Helmet - Radium

Designed for MX, Enduro, and off-road riding, this helmet delivers an exceptional blend of performance, protection, comfort, and lightweight construction. Its thermo-injected shell uses a reinforced polymer blend with varied thicknesses to optimize impact protection and weight, while the impact-resistant thermoplastic outer shell and composite fiber inner construction provide additional protection between the shell and EPS liner.

Key Features
Multiple-density inner liner with a six-piece EPS design and five densities effectively manages volume, impact performance, and overall weight. A polished EPS liner with a low-friction coating helps reduce friction with the comfort liner and manage rotational forces during oblique impacts. The inner and outer surfaces are engineered to minimize the effects of oblique impacts.

Ten air inlets and seven exhaust ports maximize ventilation and heat transfer, while the visor directs airflow into the ports for enhanced ventilation. The visor release system is designed to release at a predetermined force, helping reduce forces on the rider’s neck during an impact. Hydration tube channels are integrated into the cheek pads for added convenience.

Comfort and Protection
The fit can be tailored using the crown and cheek pads. The comfort liner is constructed from recycled materials to help reduce the helmet’s carbon footprint, and 3D-contoured foam enhances comfort. A 25 mm soft textile chin strap provides safety and comfort, while stainless steel D-rings ensure a secure fit.

The Emergency Release System and removable cheek pads allow for safe, easy removal while the helmet is still worn. The chin area is optimized for superior impact performance, making this helmet a dependable choice for demanding off-road riding.