N95 versus KN95

Thursday, March 26th, 2020

3M has a recent technical bulletin that spells out the subtle differences in filtering facepiece respirator classes, such as FFP2, KN95, and N95 — and the differences are very, very subtle. Namely, the N95 masks that are out of stock across the country are indistinguishable from the KN95 masks that are sitting on the shelves, but the N95 masks are certified for use in the US medical system, and the KN95 masks are certified for use in China:

This document is only intended to help clarify some key similarities between such references, specifically to the following FFR performance standards:

  • N95 (United States NIOSH-42CFR84)
  • FFP2 (Europe EN 149-2001)
  • KN95 (China GB2626-2006)
  • P2 (Australia/New Zealand AS/NZA 1716:2012)
  • Korea 1st class (Korea KMOEL – 2017-64)
  • DS (Japan JMHLW-Notification 214, 2018)

As shown in the following summary table, respirators certified as meeting these standards can be expected to function very similarly to one another, based on the performance requirements stated in the standards and confirmed during conformity testing.

N95 Masks versus Comparables


  1. PV van der Byl says:

    Unfortunately, I can’t find any KN95 masks on the shelves of New York City stores. Or, even on Amazon. Suggestions, anyone?

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