I’ve seen emergency masks for getting out of structure and tunnel fires, and decided not to buy one based on cost and bulk. It’s worth looking into again. I do carry an N95 filter mask in my laptop bag (and one in my outdoors activity bag, and the emergency kits).

My ideal would be a firefighter’s SCBA set up in the size, weight and expense of an N95 mask. Since that’s something physics won’t allow, I’ll have to do something else.

Are there aftermarket cabin air filters for cars that work better than original equipment in fire zones?