Alpinestars SM3 Force Helmet — XS, White

The SM3 Force Helmet is engineered for MX, enduro and off‑road use, combining comfort, ease of use and advanced impact performance. 🏍️

The thermo-injected shell uses a special polymer blend with variable thickness to balance lightweight construction and protective performance.

A patented low-friction coating is applied to the inner EPS liner to reduce rotational acceleration forces from oblique impacts.

This low-friction layer acts as a slip plane, mimicking cerebrospinal fluid to help mitigate oblique-impact forces.

The visor release system is patented to ensure visor separation at a pre-determined force, helping to reduce neck loads during an impact.

Ventilation is maximized with ten inlets and seven exhaust ports for high heat transfer and consistent airflow.

Shell and liner composition (by weight): 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.