NIOSH Face Mask Classification System
There are seven different classes of filters for NIOSH-approved face masks. Here is a break down:
| N95 | Filters at least 95% of airborne particles. Not resistant to oil. |
| Surgical N95 | A NIOSH-approved N95 respirator that has also been cleared by the Food and Drug Administration (FDA) as a surgical mask. |
| N99 | Filters at least 99% of airborne particles. Not resistant to oil. |
| N100 | Filters at least 99.97% of airborne particles. Not resistant to oil. |
| R95 | Filters at least 95% of airborne particles. Somewhat resistant to oil. |
| P95 | Filters at least 95% of airborne particles. Strongly resistant to oil. |
| P99 | Filters at least 99% of airborne particles. Strongly resistant to oil. |
| P100 | Filters at least 99.97% of airborne particles. Strongly resistant to oil. |
When buying masks for protection against viruses, please make sure you get the surgical N95 type and if not found please make sure you buy at least NIOSH approved face masks. Below you will find a link to NIOSH website showing all approved face masks.
Important Links:
List of approved N95 masks: https://www.cdc.gov/niosh/npptl/topics/respirators/disp_part/respsource3surgicaln95.html
Apr 7th 2020
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