Alpinestars SM3 Radium Helmet — 2XL, Black

The S-M3 Helmet is engineered for MX, enduro and off‑road use, delivering ease of use, comfort and optimized impact performance.

Its thermo‑injected shell uses a specialised polymer blend with variable thickness to provide an optimal balance of protection and light weight.

Alpinestars' patented low‑friction coating on the main EPS liner reduces rotational acceleration from certain oblique impacts by acting as a slip plane similar to cerebrospinal fluid.

The patented visor release system is designed to release at a predetermined force to help reduce neck loads during an impact.

• Maximised ventilation with 10 inlets and 7 exhaust ports for efficient heat exchange.
• Materials: 48% acrylonitrile‑butadiene‑styrene, 20% polyurethane, 16% polystyrene (EPS), 6% polypropylene, 4% polyvinyl chloride, 2% ethylene‑vinyl acetate, 2% steel, 1% expanded polypropylene, 1% polyamide.