What is the difference between KN95 masks and N95

KN95 masks vs N95
N95 masks are the US standards for respirator masks; KN95 masks are the Chinese standards for respiratory masks. As per this document and chart from the mask manufacturer 3M, “it is reasonable to consider” China’s KN95 “equivalent” to US N95 at this time of N95 limited supply.

Is KN95 mask reusable?

Most disposable face masks are intended to be used once and replaced as needed. Due to the limited supply, the CDC has a list of recommended reuse methods.  You can find these methods listed here. 

is KN95 a good mask?

The C.D.C. lists KN95 masks as a suitable alternative when N95s are not available.

You can also read more about this at New York Times