Good sealing mask for work with dust and fumes

The 3M Half Mask (here the model 4255) covers the mouth and nose reliably, through the different bands can be adjusted individually, I have taken 2 hours without leading to uncomfortable pressure points.
Of course, one does not breathe as freely as without a mask, but I had not at any time feel that I get into oxygen deficiency etc.
The 3M provides protection against both gases and vapors as well as against particles. The case reached values ​​are industrially specified (A2P3-protection) and also provide the commercial use protection, for the hobby handyman usually comes with dust and ink / varnish vapors into contact it is all appropriate.
Warning: There is a one-way mask, because the filter is not interchangeable!