RESPIRATOR MASK

This mostly 3D printed facemask is composed of 4 separate parts: The printed mainbody, a filter (cut out of a standard blue medical facemask, other filters are possible as well), a printed grid-frontpiece that snaps into the mainbody to hold the filter in place (after some sanding), and 2 rubber bands (reused from the cut up blue medical mask and secured with nuts & bolts).
To make the mask more comfortable you can hot glue some foam onto the edge like I did.