When you think about it, the mask issue needs a view from outer space perspective. If you were going to a planet which had oxygen in the atmosphere but the atmosphere had toxicity in it, what would you do to prepare to go there?
You would make a space helmet with an electrically powered gizmo to create a benign, comfortable atmosphere inside it. And that is where we are. With the caveats that you also want
Sounds doable to me. All the electric gizmo" takes is battery-operated low-pressure blowers for the intake and exhaust filters - piece of cake.
Giant, clear plastic human hamster balls might work, or maybe enclosed electric scooters, preferably with radios and AC. I see a federal entitlement in the offing.