An N95 mask is a filtering facepiece respirator (FFR) that meets the National Institute for Occupational Health & Safety (NIOSH) N95 classification for air filtration, removing particulates from the air that are breathed through it and capable of filtering out at least 95% of very small particulates and large drops including dusts, mists, fumes, bacteria, and viruses. However, an N95’s protection is only as good as its fit.
OSHA outlines a protocol, as well as general requirements for fit testing in Standard 1910.134 App. A. As part of the policy, employers are required to fit test employees which are required to wear an FFR to do their job. So, what is a fit test? And how can employers ensure they are properly following the protocols?