Alpinestars SM5 Sail Motorcycle Helmets

The Alpinestars SM5 is the result of over five years of intensive study, development, and testing. It was designed to provide MX riders with a helmet that is purposefully engineered to deliver the ultimate balance of impact protection, lightweight performance, and superior comfort.

High-Tech Thermo-Injected Shell

• Advanced Polymer Blend: Features a thermo-injected shell with varying degrees of thickness to optimize impact resistance and weight.

• 5-Density EPS Liner: Ensures the correct density is applied to the correct area for enhanced energy absorption across the entire helmet.

• Anatomical Sizing: Constructed with 3 unique shell sizes and 3 individual EPS inner liner sizes to provide 6 unique fitment options for maximum safety.

• Lightweight Performance: The ECE-certified version weighs only 1,350 grams (Size Medium), reducing neck fatigue during long motos.

Revolutionary Safety & Protection

• Collarbone Protection: Features an engineered raised area with padding to significantly reduce forces transmitted to the collarbone during a crash.

• Patented Visor Release System: Ensures the visor releases with a pre-determined amount of force, regardless of the impact angle, preventing additional rotational stress.

• Oblique Impact Mitigation: The inner and outer surfaces are engineered to minimize the effects of angled impacts.

• Rotational Force Management: Utilizes a proprietary low-friction surface on the inner EPS liner to fight and mitigate rotational impact forces.

Next-Gen ECE 22.06 Performance

• Superior Impact Rating: Achieves a 44% better regular-speed impact rating compared to previous standards.

• Multi-Speed Safety: Surpasses standard linear impact scores by 32% (low-speed) and 31% (high-speed).

• Rotational Oblique Performance: Under the new ECE 22.06 regulations, the SM5 scores an impressive 70% under the regulation limits.

Optimal Ventilation & Ergonomics

• Maximized Airflow: Multiple air inlets and exhaust ports provide high levels of heat transfer for all-day cooling.

• Aero-Optimized Visor: The visor is specifically designed to direct air into the intake ports for enhanced ventilation.

• Wider Lower Volume: The lower shell volume (Sizes M to 2XL) has been revised to be 3% wider, making the helmet significantly easier to put on and take off.

• Sculpted Chin Bar: The base area is sculpted to provide a relief section, raised to clear the collarbone for improved rider mobility.

Technical Specifications

• Certification: Conforms to ECE R 22.06.

• Weight: 1,350g (Size M).

• Shell Material: Impact-resistant Thermoplastic.