This layer essentially acts as a slip plane to mimic the brain’s own low friction cerebrospinal fluid, which is the body’s natural defense against oblique impacts. The SM3 Youth weighs 1060g. ModelSupertech M3.
2026 Alpinestar S-M3 SM3 Fray Motocross Helmet Black Orange Yellow Flo Glo Youth
Alpinestars S-M3 Fray Youth Motocross Off-Road MX Helmet Red / Yellow / Black
Alpinestars 2026 SM3 Wurx Youth Motocross Helmet Black Yellow Blue Red Gloss
Alpinestars 2026 SM3 Force Motocross Helmet White Glossy
Alpinestars 2026 SM3 Heat Motocross Helmet Silver Blue Black Matt
NEW 2026 ALPINESTARS SM3 S-M3 HELMET FRAY BLACK ORANGE YELLOW FLUO MOTOCROSS MX
