This is a proper 3M mask with filters, of course made for Chinese market, but it's still 3M. Very good quality.
Update: I used it for wall sanding and the mask really is of a very good quality, quite comfortable. The package actually says that mask is made in USA, and it looks like truth.
This is a proper 3M mask with filters, of course made for Chinese market, but it's still 3M. Very good quality.