Technical Bulletin July, 2021 Revision 8 Similar-Fit Model Pairings of 3M Filtering Facepiece Respirators How to Use This Information This information can help organizations plan for both immediate respirator acquisition and use, and for future respirator needs, stockpiling, and contingency planning. It is not intended to supplant or contradict regulatory requirements. This information is valid as of the date of publication. However, the comparability of 3M respirator models may change in the future. This is a living document, and the content may be updated. Please always use the 3M Personal Safety Division URL to access the PDF through a web browser to access the most up-to-date version. Background Employers need to consider the fit characteristics of each respirator model when respir

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