ALPINESTARS(MX) SM3 Radium Helmet — Size M

SM3 Radium Helmet — engineered for MX, enduro and off‑road use. 🪖

Thermo-injected shell construction uses a special polymer blend with varying thicknesses to balance impact protection and low weight.

A patented low-friction coating is applied to the inner EPS liner to reduce rotational acceleration from oblique impacts by acting as a slip plane similar to cerebrospinal fluid.

Patented visor release system ensures visor release at a predetermined force to help reduce neck loads during an impact.

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