Alpinestars Supertech M5 Solid Helmet 8303023
The Alpinestars Supertech M5 Solid is a modern off-road helmet designed for motocross, enduro and demanding off-road lightweight thermoplastic shell, advanced impact management and highly efficient ventilation system provide a balanced combination of protection, comfort and performance.
Key Features
- Lightweight outer shell made from technologically advanced, impact-resistant thermoplastic
- Two shell sizes to optimize fit, comfort and protection across different head sizes
- Side shell profile combined with soft EPS foam to help reduce collarbone injury risk in the event of a crash
- Inner and outer surfaces engineered to help reduce the effects of oblique (angular) impacts
- Multi-density EPS liner to deliver targeted impact absorption in key zones
- Patented visor release system with a pre‑determined release force, regardless of impact angle
- Extensive intake and exhaust ports to maximize airflow and heat transfer
Safety and Impact Protection
The Supertech M5 Solid helmet construction focuses on controlled energy management and impact dispersion.
- Advanced impact-resistant thermoplastic shell engineered for strength and durability
- Multi-density EPS inner liner that places higher or lower density foam in strategic areas for optimized impact absorption
- Side shell design combined with soft EPS around the lower edge, developed to help minimize collarbone damage
- Inner and outer surface profiles designed to limit rotational forces from oblique impacts
- Stainless steel D-rings for a secure and consistent chin strap closure
- Soft 26 mm textile chin strap, wider than standard certification requirements, for improved load distribution and comfort
- Patented visor release system that allows the visor to detach with a specific, controlled force in a crash
Comfort, Fit and Interior
The interior of the Supertech M5 Solid is developed for long riding days, combining stable fit, comfort and hygiene.
- 3D contoured cheek pads for a snug, stable fit and enhanced comfort around the jaw and cheek area
- Emergency release system with removable cheek pads to facilitate safer helmet removal after an accident
- Removable comfort liner made from Silverplus® treated anti-bacterial fabrics
- Moisture-wicking liner materials that draw perspiration away from the skin for a cooler, drier feel
- Anti-microbial liner components that can be removed and washed to maintain freshness
- Hydration tube channels integrated into the cheek pads for convenient routing of a hydration system
Ventilation and Heat Management
The ventilation system of the Supertech M5 Solid is engineered to promote continuous airflow and efficient heat dissipation.
- Multiple intake vents positioned on the chin, brow and top of the helmet to direct fresh air into the shell
- Exhaust ports at the rear to evacuate warm, humid air from inside the helmet
- Visor shape specifically designed to channel air toward the intake ports for enhanced airflow
- High levels of heat transfer exchange to help keep the rider comfortable in hot and intense riding conditions
Construction and Materials
The Supertech M5 Solid uses a carefully selected material mix to balance structural integrity, impact absorption and comfort.
| Material | Approximate Composition |
| Acrylonitrile-Butadiene-Styrene (ABS) | 47% |
| Expanded Polystyrene (EPS) | 17% |
| Polyurethane | 17% |
| Nylon | 6% |
| Polypropylene | 6% |
| PVC | 4% |
| Thermoplastic elastomer | 1% |
| Steel | 1% |
| Other components | 1% |
Typical Use Cases
- Motocross and MX competition riding
- Enduro and hard enduro riding in varied terrain
- Off-road trail riding where ventilation and comfort are critical
- Training sessions and track days requiring reliable impact protection