Anatomically engineered and profiled specifically for youth and younger riders, the all-new SM3 Youth Helmet is optimized for MX, Enduro and Off-road use. It features a whole raft of technologies and innovations taken from Alpinestars range of adult helmets to deliver the optimal blend of performance, protection and comfort. The SM3 Youth weighs 1060 g (ECE). The lightweight construction features a thermally injected shell made from a special polymer blend with different thicknesses for an optimum combination of impact protection and low weight. The outer shell is made of impact-resistant thermoplastic, available in three sizes (Youth Small, Youth Medium and Youth Large). The customizable fit allows for helmet calotte and cheek pads in various thicknesses available as spare parts. Sizes Youth Medium (YM) and Youth Large (YL) have the same EPS size for growth with the rider. Youth Small (YS) has a smaller EPS size and special fit for 3-4 year old children.