Alpinestars S-M7 Cast Helmet — 2XL, Blue

Overview

Engineered for off-roading racing, this lightweight composite-shell helmet balances superior ventilation and comfort with advanced impact protection. 🪖⛰️🌬️

Key features

• A-head fitment and visor detaching system with integrated Plasma technology at the lower shell edge for optimized energy dissipation around the collar bone area.
• Aerodynamic profile with a streamlined shell curvature to promote deflection and efficient energy transfer away from the head and spinal column.
• Ultra-ventilated design with 20 intake and exhaust ports (13 intakes, 7 exhausts) for consistent airflow.
• Visor detaching system engineered to automatically release under impact energies greater than 15 joules to reduce transfer of force to the head.
• Communication-system compatible with cutaway sections and earphone recesses for seamless intercom installation.

Comfort & fit

• Removable, washable linings treated with antimicrobial fabrics for hygiene and easy care.
• Customizable fit via replaceable cheek pads available in multiple thicknesses and interchangeable across shell sizes.
• Crown and neck pads are elastically connected to improve oblique impact management; top pad is removable and adjustable in height thanks to the a-head system.
• Cheek pads include a channel for hydration tube installation and an emergency extraction system for safe helmet removal.
• Chin strap fitted with 25 mm nylon webbing and stainless steel double-d ring fasteners; removable covers for washing.

Construction & protection

• Composite fiberglass shell designed to minimize external load points and enhance structural integrity on impact.
• Integrated Plasma side pads for targeted shock absorption in critical contact areas.
• Internal materials include fiberglass, expanded polystyrene (eps), polyurethane, polypropylene, polyvinyl chloride, steel, polyamide, acrylonitrile-butadiene-styrene, and polyester in specific ratios for balanced protection and comfort.
• Integrated channels on both sides to accommodate a hydration system.

This helmet is optimized for high-performance off-road environments where ventilation, lightweight construction, and reliable impact-management are essential.