Alpinestars Youth SM3 Radium Helmet — Youth L, Gloss finish

🧒🏁 The Youth SM3 Radium Helmet is anatomically engineered for younger riders and optimized for off-road and enduro use, delivering a race-ready fit in a youth-specific profile.

The thermo-injected outer shell uses a special polymer blend with variable thickness to balance impact protection and low weight, and is offered in three shell sizes: Youth Small, Youth Medium and Youth Large. The youth shell weighs approximately 1060 g.

Fit can be tailored via interchangeable crown and cheek pads, available as spare parts in multiple thicknesses, while Youth Medium and Youth Large share the same EPS size to allow straightforward growth adjustment.

A multiple-density inner liner provides targeted impact absorption and reduced mass, while low-friction coating on the main EPS liner helps lower rotational acceleration in oblique impacts. The helmet also features a patented visor release system that reduces neck forces in an impact and an Emergency Release System with removable cheek pads for safe helmet removal.

Comfort and convenience are prioritized with recycled-material comfort liners and integrated hydration tube channels in the cheek pads. Ventilation is maximized through ten inlets and seven exhaust ports, with a visor designed to channel air through the vents for improved heat transfer.