N95 vs KN95

N95 VS. KN95

FFP (Filtering Facepiece Respirators), Covid-19, and You.

KN95 mask


KN95 are masks made in China (as are a lot of N95 masks) that have passed the stringent Chinese GB2626-2006 performance standard.

-Are They Good Masks-

The CDC2 lists KN95 masks as a “suitable alternative to provide protection during the COVID-19 response when supplies (of N95) are short”

3M3 the manufacturer of many N95 masks has also issued a comparison between N95 and Kn95 stating that “respirators certified as meeting these standards can be expected to function very similarly”.

3M further states that “China KN95…as ‘equivalent’ to US NIOSH N95 for filtering non-oil based particles such as those resulting from…bio-aerosols (e.g. viruses)


Originally, in spite of the endorsements of 3M and the CDC the FDA refused to approve the KN95 stating:  “They have not been selected by the FDA1 as an approved FFP appropriate to protect health and safety”.  Their reasoning was tht they had not passed the American NIOSH 42CR84 Approval. But, many were of the opinion that the reason was more political than scientific4.

Whatever the reasons, on 4/3/2020, the FDA started giving approvals for specific manufacturers of the KN95 mask.  In their press release they explained why they chose to change their minds saying: “…in response to this evolving public health emergency and continued concerns about filtering facepiece respirator availability, FDA concluded based on the totality of scientific evidence available that certain product classifications for imported disposable FFR’s that are manufactured in China and not NIOSH-approved and for which data exists that supports the respirators’ authenticity are appropriate to protect the public health or safety…”5

Regardless of the FDA’s motives what is important is that the KN95’s are available for general use and provide a level of protection for our community, meaning that the NIOSH approved N95’s are at the hospitals where they belong.

If you want to know if the manufacturer of the KN95 mask you are looking at is on the list of approvals check the Appendix listing them it was last updated 4/13/2020 as of this writing and hopefully, it will keep growing so that everyone has access to protective gear.  The list can be found here: https://www.fda.gov/media/136663/download




  1. Imported, Non-NIOSH-Approved Disposable Filtering Facepiece Respirators EUA. Issued March 28, 2020. Accessed March 31, 2020 https://www.fda.gov/media/136403/download
  2. https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirators-strategy/crisis-alternate-strategies.html Page last reviewed: March 17, 2020. Accessed: March 31, 2020 Content source: National Center for Immunization and Respiratory Diseases (NCIRD)Division of Viral Diseases
  3. Comparison of FFP2, KN95, and N95 and Other Filtering Facepiece Respirator Classes Technical Bulletin issued: January, 2020 Accessed March 31, 2020. https://multimedia.3m.com/mws/media/1791500O/comparison-ffp2-kn95-n95-filtering-facepiece-respirator-classes-tb.pdf

4. Coronavirus Cases Have Surged, But The US Is Refusing To Take The World’s Most Available Masks (Bensinger, Ken) Buzzfeed.News  March 29,2020. Accessed March 31, 2020  https://www.buzzfeednews.com/article/kenbensinger/coronavirus-kn95-masks-us-wont-import-china

5.Non-NIOSH-Approved Disposable Filtering Facepiece Respirators Manufactured in China Issued April 3, 2020. Accessed April 14, 2020. https://www.fda.gov/media/136664/download

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