Alpinestars Alpinestars SM5 Solid Helmet, Lightweight Protection for MX Riders

The SM5 helmet has been designed to provide MX riders with a helmet that is safe and purposefully designed to deliver optimal protection and comfort. The lightweight SM5 helmet features a thermo-injected shell incorporating a special polymer blend enhanced by varying degrees of thickness that is engineered to deliver the optimal combination of impact protection and light weight, while the five density EPS liner ensures the correct density in the correct area for enhanced impact absorption. About this item Cotton/polyester blend Imported Lightweight outer shell is constructed from a technologically advanced impact resistant thermoplastic in two sizes Designed to direct air into the ports for enhanced airflow Hydration tube channels are integrated into the helmet’s cheek pads for convenience and performance The inner and outer surfaces are engineered to minimize the effects of oblique impacts Side shell couple with soft EPS foam prevents damage to collarbone in the event of a crash › See more product details