Alpinestars SM3 Radium Helmet

Alpinestars SM3 Radium Helmet - Next-Level Protection, Comfort, and Performance for Off-Road Riders

The Alpinestars SM3 Helmet redefines what riders can expect from an off-road helmet, combining cutting-edge safety innovations, superior ventilation, and premium comfort in one lightweight design. Engineered for motocross, enduro, and off-road enthusiasts, the SM3 delivers exceptional impact protection, optimized airflow, and a secure, customizable fit - so you can ride harder, longer, and with total confidence wherever the trail leads.

Key Features & Benefits:

• Revolutionary Impact Protection: Advanced EPS (Expanded Polystyrene) liner with Alpinestars' patented low-friction coating reduces rotational acceleration forces from oblique impacts, mimicking the brain's natural defense system for superior head protection.
• Lightweight, Durable Shell: Thermo-injected polymer blend with variable shell thickness delivers optimal impact absorption while minimizing weight for improved comfort and agility.
• Enhanced Neck Safety: Innovative patented visor release system minimizes neck strain by ensuring the visor detaches with a precisely calibrated amount of force during impact.
• Superior Ventilation System: 10 intake vents and 7 exhaust ports provide maximum airflow and efficient heat transfer, keeping you cool and focused even in demanding off-road conditions.
• Multi-Density EPS Liner: 5 inner parts with 4 density levels distribute impact energy effectively for balanced protection across all helmet zones.
• Customizable Fit: Crown and cheek pads are available in multiple thickness options, allowing riders to fine-tune the fit for maximum comfort and security.
• Eco-Friendly Comfort Liner: Interior padding is made from recycled materials, offering soft comfort while reducing environmental impact.
• Hydration Ready: Built-in hydration tube channels in the cheek pads add convenience for long-distance or endurance rides.
• Emergency Release System: Quick-access cheek pads enable safe helmet removal during emergencies without compromising rider safety.
• Secure Closure: 25mm soft textile chin strap with stainless steel D-rings ensures a snug, reliable fit throughout the ride.
• Chin Area Reinforcement: Optimized shell thickness and structure enhance impact performance in the chin area, exceeding standard homologation requirements.
• Meets or exceeds DOT and ECE 22.06 safety certification standards

Why Choose the Alpinestars SM3 Helmet?

The Alpinestars SM3 Helmet is built for riders who demand uncompromising safety, premium comfort, and race-proven performance. Every detail - from its advanced rotational-impact technology to its optimized airflow and custom-fit interior - reflects Alpinestars' commitment to rider protection and innovation. Whether you're tackling motocross tracks or rugged off-road terrain, the SM3 lets you focus on the ride with total confidence in your gear.