This specification covers protective face guards for sports such as youth baseball (batters and baserunners). This type of face guard is designed to be attached to a pre-existing helmet. The equipment covered by this specification is intended to reduce hazards of injury to the face, including eyes and mouth, due to impacts from baseballs or softballs. The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. The following precautionary caveat pertains only to the test method portion, Section 5, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.