The Alpinestars SM5 helmet is the result of more than five years of intensive study, development & testing. Based on Alpinestars’ five decades of protection development, every possible aspect was scrutinized to engineer a helmet that is safe & thoughtfully designed to deliver optimal protection & comfort. Features An engineered raised area with padding effectively reduces the forces transmitted to the collarbone & a patented visor release system that ensures the visor is released with the correct pre-determined amount of force, irrespective of the angle of impact Lightweight outer shell is constructed from a technologically advanced impact resistant thermoplastic in two sizes The inner & outer surfaces are engineered to minimize the effects of oblique impacts Multiple density inner liner to ensure the correct density in the correct area for enhanced impact absorption Patented visor release system ensures the visor is released with the correct pre-determined amount of force, irrespective of the angle of impact Maximized ventilation & high levels of heat transfer exchange thanks to multi-air inlets & exhaust ports The visor has been designed to direct air into the ports for enhanced airflow Hipro High Impact Polymer Parametric Shell A polymer blend enhanced by varying degrees of thickness engineered to deliver the optimal combination of impact protection & light weight. 5 Density EPS Liner The right density in the right area for enhanced impact absorption. Integrated Collarbone Protection Features an engineered raised area with padding to effectively reduce the forces transmitted to the collarbone. Patented Visor Release System Allows visor to release in a crash with the correct pre-determined amount of force regardless of angle of impact. Oblique Impact Protection Inner & outer surfaces engineered to minimize effects of oblique impact. Ultra Ventilated Design Visor directs air into ports for enhanced airflow Lightweight Construction A size Medium weights 1260 gr. (ECE) ERS Emergency Release Sytem Permits the safe & easy removal of the cheek pads while the helmet is still on Hydration Compatibility Integrated cheek pad loops hold hydration hose 26 mm wide chin strap The strap is wider than certification requirements for safety & rider comfort Certification Certified according to ECE 22.05 Note Please be aware, as long as nothing else is written in the item description: All helmets will be delivered only with the ECE certification by default, even if it is shown differently.