ALPINESTARS(MX) SM3 Radium Helmet — Size S, Black, Gray, Yellow

The SM3 Radium Helmet is engineered for MX, Enduro and off‑road use, featuring innovations optimized for comfort, ease of use and impact performance.

Its thermo-injected shell incorporates a special polymer blend with variable thickness to deliver an optimal balance of impact protection and light weight.

A patented low-friction coating on the inner EPS liner acts as a slip plane to reduce rotational acceleration from certain oblique impacts, mimicking the brain's natural cerebrospinal fluid defense.

The patented visor release system ensures the visor releases at a predetermined force, helping to reduce forces on the neck during an impact.

Maximized ventilation with 10 inlets and 7 exhaust ports provides high levels of heat transfer and efficient airflow. 🪖