Faceshields != masks. Those lend themselves a bit better to printing than proper masks (since it's mostly a sheet of transparent plastic + one plastic piece to hold it)

Do you have the link to an STL so I can print one? I have an Ender 3 Pro

I printed these https://budmen.com/ until I ran out of PLA. I don't honestly have any knowledge about their effectiveness, but while my city is under shelter-in-place it seemed as good a way as any to pass the time.

I saw a few different designs for 3D printed PPE out there - I went for this one because the materials were all things I could source and they were one of the only places I saw that would help coordinate matching you up with medical professionals that want what you've printed.

Prusa designed a face shield which was verified by the Czech Ministry of Health. There's an assembly guide for making your own, too: https://www.prusaprinters.org/prints/25857-prusa-protective-...