The Alpinestars SM5 helmet is designed for MX riders, offering a safe and purposefully engineered solution for optimal protection and comfort. This lightweight helmet features a thermo-injected shell with a special polymer blend, varying in thickness for the ideal balance of impact protection and low weight. The five-density EPS liner ensures appropriate density in critical areas for enhanced impact absorption. The ECE version of the SM5 Helmet weighs 1,350 grams for a size medium with helmet peak and features a Double D-Ring closure. Article: Alpinestars S-M5 Solid 2024 Motocross Helmet, black, Size M for Men.