Agree, the N-95 masks pack flat so they easily fit in kits that already exist — the FAK under my truck’s driver seat and the larger FAK in the main kit in back. Besides, for simple smoke at a distance such as what the folks in SF have now from the fires up north, a simple, cheap N95 mask is all you need. I’ve used an N95 in those conditions and a cheap N-95 mask is more than adequate.

For a fire that’s closer, where smoke is thick, and gasses may also be present and more than a nuisance, a mask that can handle gas/fumes as well as smoke particles is a better option. A real respirator is bigger & more bulky, but unless you have an SCBA, you need a filter system that can use the air around you; it needs to bring that air up to a quality that allows you to keep driving during your egress. The 3M half-face respirator KenK linked to above looks like a good option.

I did some research, post 9/11, so it’s somewhat dated . Based upon that research, I chose and continue to choose the Xcaper smoke mask in my EDC backpack emergency kit. It is very compact and lightweight and the manufacture asserts that it absorbs CO. It is my choice to get me out of the smoke-dust-debis filled air in a high rise or train tunnel fire/ explosion. Since it is a half mask, I also carry a largish pair of swim goggles to give full eye protection. I would have to remove my eyeglasses if “masked-up”. But at 0’ to 50’ that’s almost a non-issue, as my unaided vision is adequate at those distances. Note, I also have 2 flat-fold N-95 masks with extra exhale valve, for less lethal situations.

I’d be interested to know if anyone uses a similar set-up for such urban challenges ? Details desired.