Alpinestars Helmet Sm3 Youth Wurx Ece06 - Blue ensures compatibility and performance for off-road and motocross use.

This lightweight helmet features a thermo-injected shell made from a special blend of polymers reinforced in varying thicknesses, designed to offer an optimal combination of impact protection while remaining lightweight.

The lightweight outer shell is made from a state-of-the-art, impact-resistant thermoplastic. It is available in three sizes (Youth Small, Youth Medium, and Youth Large). The SM3 Youth weighs 1060g (ECE) and 1170g (DOT).

Different shell types are available to meet DOT and ECE requirements; the DOT-certified version of the helmet's inner shell is made with a composite fiber bonded between the outer shell and the EPS liner for maximum impact protection.

The helmet adapts to the rider's head thanks to the liner and cheek pads, which are available as spare parts in different thicknesses.

The Youth Medium (YM) and Youth Large (YL) sizes share the same EPS foam size, allowing YM-sized riders to initially purchase a YM helmet and then upgrade it to Youth Large as they grow, using replacement liner and cheek pads.

The Youth Small (YS) size has a smaller EPS foam size and can only be customized at the cheek pad level. Extensive research by Alpinestars has shown that children wearing a YS size are very small, typically 3 to 4 years old, and therefore require a helmet with a specific fit.