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The Alpinestars SM3 is a motocross helmet for young riders, built with a composite fiberglass shell and a gloss finish. It is vented for airflow and uses a unisex youth fit. Against other youth MX helmets, the fiberglass shell is a step up from the polycarbonate shells common at the entry level, while it stays simpler than premium models with multi-density liners and quick-release cheek pads. It suits kids riding dirt, trails or track who need a proper off-road lid.
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The Alpinestars SM3 Fray is a youth motocross helmet for ATV, off-road and UTV riding. It has a gloss black and orange finish with yellow fluo accents. The shell is a thermo-injected polymer blend, with varying thickness to balance impact protection and light weight.
The inner liner uses multiple densities, with the right density in each area for impact absorption and lower weight. The inner and outer surfaces are engineered to minimize the effects of oblique impacts. A low friction coating on the inside of the main EPS liner acts as a slip plane to reduce rotational acceleration forces from certain oblique impacts.
Ten inlets and seven exhaust ports provide ventilation and heat transfer. The visor is designed to direct air into the ports. Its release system lets go with a pre-determined amount of force, which reduces the forces on the rider's neck during an impact. The crown and cheek pads are available as spare parts in different thicknesses to tailor the fit. The comfort liner is made from recycled materials.
