One reason for this is N95 masks are considered to have marginally more grounded prerequisites for breathability under the US Code of Federal Regulations for N95 masks. KN95 masks, then again, are to a great extent viewed as more qualified for business and individual use. As well as having comparative capacities as the N95 mask, they are likewise more promptly accessible and hence simpler to access for those not working straightforwardly to battle the infection.
This diagram from 3M features more explicit contrasts between the two masks, as well as showing insights of masks that have been being used in nations like Korea (first Class) and Japan (DS FFRs).
As should be obvious, both the N95 and KN95 masks share comparable characteristics in the essential proportions of mask effectiveness such Flow Rate and Filter Performance rate. In any case, there are some slight contrasts between the masks that are made clear on the diagram also. The inward breath obstruction is marginally higher for the KN95 mask, similar to the exhalation opposition. This outline likewise shows how various guidelines of estimations were utilized in deciding whether the masks had the option to meet their nations’ particular prerequisites. For example, not at all like the K95 mask, the N95 mask was not needed to meet a CO2 freedom prerequisite.