Anatomically designed and profiled specifically for youth and younger riders, the all-new SM3 Youth is optimized for MX, Enduro, and off-road use and features a host of technologies and innovations from Alpinestars' adult helmet range to offer the optimal blend of performance, protection, and comfort.

This lightweight helmet features a thermo-injected shell incorporating a special polymer blend enhanced by varying degrees of thickness, designed to offer the optimal combination of impact protection and lightweight construction.
Technologically advanced impact-resistant thermoplastic in three sizes (Youth Small, Youth Medium, and Youth Large). The SM3 Youth weighs 1060 g (ECE).

The fit can be customized to the rider's head thanks to the helmet's crown and cheek pads, available as replacement gonuine in different thicknesses.
The Youth Medium and Youth Large sizes share the same EPS sizing, allowing riders with a YM helmet to initially purchase a YM helmet and then configure it to a Youth Large size as they grow using replacement crown and cheek pads.
The Youth Small has a smaller EPS sizing and is customizable only with the cheek pads.
Alpinestars
extensive research has shown that children wearing a YS size are very small, typically 3 to 4 years old, and therefore require a dedicated helmet fit.
The multi-density inner liner ensures the helmet has the correct density in the correct area for improved impact absorption, also helping to reduce overall weight.
The internal and external surfaces are designed to minimize the effects of impacts. oblique impacts.
Alpinestars' patented low-friction liner is applied to the inside of the main EPS liner to reduce rotational acceleration forces that can result from certain oblique impacts. This layer essentially acts as a slip plane to mimic the brain's low-friction cerebrospinal fluid, which is the body's natural defense against oblique impacts.
The patented visor release system ensures the visor is released with the correct amount of predetermined force, effectively reducing forces on the rider's neck during an impact.
The comfort liner is constructed using recycled materials for a smaller carbon footprint.
Hydration tube channels are integrated into the helmet's cheek pads for comfort and performance.

Alpinestars introduced a standard for the SM3 Youth to test the helmet's chin area under more severe conditions than the homologation standard. To exceed Alpinestars' new standards, the shell thickness and the helmet's design structure have both been optimized in the chin area for superior impact performance.

Equipped with a Emergency release and removable cheek pads allow for easy and safe removal while the helmet is still on, while 3D-molded foam ensures rider comfort.

The soft, 25mm fabric chin strap ensures optimal rider safety and comfort.
Stainless steel D-rings ensure a snug, secure fit.
The SM3 helmet complies with ECE 2206 for worldwide use.