The all-new SM5 helmet is the result of more than five years of intensive study, development and testing. Hipro High Impact Polymer Parametric Shell A polymer blend enhanced by varying degrees of thickness engineered to deliver the optimal combination of impact protection and 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 and outer surfaces engineered to minimize effects of oblique impact. Ultra Ventilated Design Visor directs air into ports for enhanced airflow. Certified according to ECE 22/05 Lightweight Contsruction A size Medium weighs 1260g (ECE), 1370g (DOT) ERS Emergency Release Sytem Permits the safe and 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 and rider comfort.