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Alpinestars S-M3 Heat Helmet - White/Purple/Pink Gloss

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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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.