Dear geeks with huge #respirator I saw at previous #FOSDEM ! Would you be kind to make a BOF session or a hallway track on respirators?

- Why are there no transparent masks (with real health protection) which don't obstruct face?
- What are the best masks for speakers?
- Are the cartridge respirators better?
- Where's the sweet spot between protection and public engagement (not making wearer look like biohazard liquidator or specops)
- When open hardware respirators, produced at hackerspaces?