Face masks: the smallest/lightest option that's effective against sub-1-micron materials?
Specifically cigarette smoke, which ranges from 0.1 to 1 micron and averages about 0.3 microns. What I've found so far:
- standard allergy masks and in-nostril filters don't work for cigarette smoke, which is about a hundred times smaller than most pollens (pollens average 25-30 microns);
- "negative ion"-based, around-the-neck air filters seem to be ineffective in this case and are potentially dangerous anyway
- I can find lists
for industrial-level protection, but they don't seem to be rated in terms of microns. (I will put in a few email queries to supply companies once I understand better what I'm asking for.)
To the extent this matters, it seems to be the toxins rather than the smoke itself; I don't seem to have any physical/breathing issues with cigarette smoke. I just get increasingly lightheaded, nauseated, and out of it (trouble thinking/talking, focusing my eyes, etc.).
This is a question about masks/filtration; I'm not remotely asking about how to change anyone's behavior/culture.
(The few threads I've found elsewhere on this topic all deteriorated fast into debates about smoking; let's not do that here!) Asking because of future travels where my best possible planning may still leave me in some smoky environments I can't slip out of right away, so the solution at those times will be putting on the most travel-friendly mask that will actually help me (hopefully something below gas mask-level weight/bulk).