In short, N95 masks are the US standards for respirator masks; KN95 masks are the Chinese standards for masks. These are the requirements that the US National Institute for Occupational Safety and Health requires manufacturers to meet in order to label their masks as N95s. Despite the long list of differences, the two masks are equivalent or nearly equivalent on the features that most people care about.
Click here to read more on the difference between the two types: https://smartairfilters.com/en/blog/whats-the-difference-between-n95-and-kn95-masks/
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