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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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