Alpinestars SM3 Solid Helmet — Size S, Black

The S-M3 helmet is engineered for MX, Enduro and off-road use, featuring innovations and technologies optimized for ease of use, comfort and impact performance.

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

Alpinestars' patented low-friction coating on the inner EPS liner reduces rotational acceleration from certain oblique impacts by acting as a slip plane that mimics cerebrospinal fluid.

A patented visor release system ensures visor detachment at a predetermined force to help reduce forces on the neck during an impact, while maximized ventilation—10 inlets and 7 exhaust ports—ensures high levels of heat transfer.

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.