This revision of the previous standard changes the impact attenuation requirements, deletes the requirement for wet testing of helmets, modifies the requirement and test method for peripheral vision limits, and clarifies test methods and test equipment requirements. The standard includes a statement of purpose, the scope and classification of the standard, definitions, and requirements for sampling, user information, labeling, construction, peripheral vision, impact attenuation, penetration resistance, and retention system. The specifications for test methods cover the pretest inspection, the test sequence, and the specific tests to be used. Three references are listed.