[Code of Federal Regulations] [Title 42, Volume 1] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 42CFR84.75] [Page 520] TITLE 42--PUBLIC HEALTH CHAPTER I--PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES PART 84_APPROVAL OF RESPIRATORY PROTECTIVE DEVICES--Table of Contents Subpart H_Self-Contained Breathing Apparatus Sec. 84.75 Half-mask facepieces, full facepieces, mouthpieces; fit; minimum requirements. (a) Half-mask facepieces and full facepieces shall be designed and constructed to fit persons with various facial shapes and sizes, either: (1) By providing more than one facepiece size; or (2) By providing one facepiece size which will fit varying facial shapes and sizes. (b) Full facepieces shall provide for the optional use of corrective spectacles or lenses which shall not reduce the respiratory protective qualities of the apparatus. (c) Apparatus with mouthpieces shall be equipped with noseclips which are securely attached to the mouthpiece or apparatus and provide an airtight seal. (d) Facepieces shall be designed to prevent eyepiece, spectacle, and lens fogging.