YES, THEY HAVE 2 LAYERS
I own 6 of these and they are great masks. But like every other mask I've worn, air escapes the top of the mask a little and that's when the glasses fog up.
NOT MY REVIEW
Yes, I cut 3M 8210 N95 masks horizontally in half and use them as filters in the pouch. It doesn't seal as good as an N95 cone, but it can be worn longer IMO.
I really like that you can add a filter and have extra protection and you can't smell your own breath even after eating a meal. I love that its washable and reusable. Good product. Its my 2nd pack.
Yes, it should be compliant for any company. But not medical grade