Alpinestars SM3 Radium Helmet ECE06/DOT

Engineered for MX, Enduro, and off-road riding, the SM3 Helmet integrates advanced technologies and innovations designed to enhance ease of use, comfort, and impact protection.

• Thermo-injected polymer shell with variable thickness delivers exceptional impact protection while keeping the helmet lightweight at just 1430 g (ECE) and 1460 g (DOT).
• Ten intake vents and seven exhaust ports maximize airflow for superior heat transfer and all-day riding comfort.
• Patented low-friction liner coating reduces rotational forces on oblique impacts by mimicking the brain’s natural cerebrospinal fluid slip plane.
• Innovative visor release system deploys under predetermined force to reduce neck loads during an impact.
• Removable cheek pads, integrated hydration tube channels, and recycled comfort liner offer a customizable fit and eco-conscious performance in a DOT- and ECE 22.06-certified design. Meets Federal Motor Vehicle Safety Standard 218 (FMVSS 218).