Alpinestars SM3 Solid Helmet — XL, Black

Designed for motocross, enduro and off‑road riding, this helmet blends ease of use with comfort and impact performance.

The thermo‑injected shell is built from a special polymer blend with variable thickness to balance impact protection and light weight.

A patented low‑friction coating on the inner expanded polystyrene (eps) liner creates a slip plane that reduces rotational acceleration during oblique impacts, mimicking the brain's cerebrospinal fluid.

The patented visor release system allows the visor to release at a predetermined force, helping to reduce neck loads during an impact.

Ten inlets and seven exhaust ports maximize ventilation and heat transfer for long, demanding rides.

Composition by weight: 48% acrylonitrile‑butadiene‑styrene, 20% polyurethane, 16% polystyrene, 6% polypropylene, 4% polyvinyl chloride, 2% ethylene‑vinyl acetate, 2% steel, 1% expanded polypropylene, 1% polyamide.