It might be worth having a section for sewn masks too for people who cant help with a 3d printer but might be able to produce masks? Is there a demand here too?
This Facebook post and the comments go into some detail about the questions around producing Masks:
Here’s one using materials hospitals will already have:
Using some of the same materials here’s one using a 3D printed frame:
There’s an Ars article about general face mask use here:
There’s a review of various mask designs here: