N95 and KN95 Masks Are Held to Different Standards, So You Need to Be Careful When Ch

Been using the KN95 for months. Just dropped down to regular 3 ply.
Looks like I will be going back to the KN95 again.
 
As a person that has spent 1000s of hours working in a mask they are not all the same. Different sizes and fits,and N vs KN is US made vs Chinese. I don't like anything but 3M because they fit correctly and work well for me. Who do you trust with your lungs and health?
 
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