FMVSS 218, also known as the Federal Motor Vehicle Safety Standard No. 218, is a regulation that sets forth the requirements for motorcycle helmets. This regulation outlines the minimum performance requirements for helmets to protect the wearer in the event of a crash. Additionally, FMVSS 218 establishes guidelines for helmet labeling and instructions for use. Compliance with FMVSS 218 is mandatory for all motorcycle helmets sold in the United States.