Simpson Sd1 HelmetSimpson Sd1 HelmetThe Simpson Sd1 Helmet from SIMPSON SAFETY is built for drivers who want trusted protection, comfort, and race day confidence. It is designed for motorsports use with an emphasis on dependable performance, driver focus, and a clean, race ready fit. Key Features: Helmet SD1 Snell 2020 Head and Neck Support Ready Built for motorsports use with an emphasis on protection and comfort Note: Always confirm current sanctioning body rules,