Head and Neck Restraint RevX Carbon Medium / LrgHead and Neck Restraint RevX Carbon Medium LrgThe Head and Neck Restraint RevX Carbon Medium Lrg from NECKSGEN is designed to support driver protection in demanding motorsports environments. It is a strong choice for racers who want serious safety equipment with track focused functionality. Key Features: Head and Neck Support RevX Carbon SFI 38. 1 Carbon Fiber Medium Large Note: Always confirm current sanctioning body rules, certification