RE: Tomorrow6 Jan 2021 21:16
guys, 4ply mask got single protective layer and 5ply got that layer both side of nano material.
so if we got 4ply passed the test means still it got nano material and can be used by professionals!!
it does not have necessarily to be 5ply!!
so even with 4ply we are ahead in the game and bod can decide to go for the certificate with 4ply!!