Purpose-built for motocross, enduro, and off-road riding, the Alpinestars SM3 Helmet combines advanced protection, comfort, and ventilation in a lightweight, feature-packed design. Engineered using Alpinestars’ extensive research and in-house safety standards, the SM3 delivers exceptional impact absorption, rotational protection, and rider comfort — all in one high-performance helmet.
Advanced Shell Construction
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Thermo-Injected Polymer Shell:
Crafted from a specially formulated polymer blend with variable thicknesses to optimize impact protection and weight reduction. -
Lightweight Performance:
Weighs just 1430g (ECE, Size M) for reduced fatigue without compromising safety. -
Enhanced Structural Integrity:
Reinforced chin area meets Alpinestars’ own internal safety standard, exceeding standard homologation requirements for superior impact performance.
Impact and Rotational Protection
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Multi-Density EPS Liner:
Features five EPS sections with four density zones to ensure precise energy absorption across varying impact forces. -
Low-Friction Coating (Patented):
Applied to the inner EPS liner, this innovative layer mimics the brain’s natural cerebrospinal fluid, reducing rotational acceleration forces from oblique impacts. -
Optimized Inner and Outer Surfaces:
Designed to minimize rotational effects and deflect impact energy away from the skull for improved rider safety.
Patented Safety Systems
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Visor Release System:
Automatically detaches at a pre-determined force, reducing the load transferred to the neck during an impact — regardless of impact angle. -
Emergency Release System:
Allows safe and easy cheek pad removal while the helmet remains on the rider.
Ventilation & Comfort
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17-Port Ventilation System:
Ten intake and seven exhaust vents maximize airflow and heat dissipation during intense riding conditions. -
Recycled Comfort Liner:
Eco-friendly, removable, and washable liner made from recycled materials for a lower carbon footprint and enhanced moisture management. -
3D Contoured Foam Padding:
Delivers superior comfort, pressure relief, and a secure fit throughout long rides. -
Hydration System Ready:
Integrated cheek pad channels allow seamless hydration tube installation for endurance or rally riders.
Fit and Convenience
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Customisable Interior Fit:
Crown and cheek pads are available in multiple thickness options for a tailored, precision fit. -
Soft 25mm Chin Strap:
Designed for optimal comfort and safety. -
Stainless Steel D-Rings:
Ensure a strong, secure fastening system in all conditions.
Certifications
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ECE 22.06 and DOT approved for global use — meeting the latest safety standards for impact and rotational performance.
The Alpinestars SM3 Helmet represents the next evolution in off-road protection — lightweight, aerodynamic, and engineered for riders who demand uncompromising safety and all-day comfort on any terrain.