This disposable P100 mask by 3M is approved by the National Institute for Occupational Safety and Health and promises to ...
“N95 masks provide the greatest risk reduction ... easier for the wearer to breathe — a good thing when dealing with hazardous air quality — it renders the mask useless in preventing ...
The masks, readily available at hardware stores ... However, they do not protect against hazardous gases sometimes present in smoke. Health officials emphasize that proper fit is crucial.