As far as how well they protect against COVID-19 and filter out particles, a KN95 and N95 are the same. But there are a few differences on other fronts.
·KN95 meet Chinese standards for masks, while N95 masks meet US standards.
·Every country has its own standard. Ex. KF94 is the Korean code, FFP2 is the EU and UK code.
·Both KN95 and N95 masks are rated to capture 95% of tiny particles (0.3 micron particles).
·Both KN95 and N95 masks fit tightly around your nose and mouth.
·KN95 mask manufacturers are required to run fit tests on humans with ≤ 8% leakage, while N95 masks are not.
·N95 masks have slightly higher restrictions for pressure drop while inhaling and exhaling (read: better breathability).
With such similar sounding names, it can be confusing to understand the difference between N95 and KN95 masks. What are KN95 masks, and are they the same as N95 masks? This handy chart explains the differences between N95 and KN95 masks (and all characteristics that are the same).
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.
N95 vs. KN95 Comparison Chart