A local fire department was needing face shields for the fire fighters. I made a prototype and sent it out to them. They requested 1 change to the design, which was to remove the vent hole at the top. Here is the face shield design I am cutting now. I have found that I can get 6 of these to a single sheet in the Glowforge.
If you want to see the article of the assembly, you can see that here
When you make face shields, make sure you give them a prototype first and ask if they need changes.