Certain masks are effective in protecting against wildfire smoke — but only if they are fitted and worn properly.

“How to choose face masks and how to wear them are ... woven masks and dust masks have largely different leakage rates depending on whether they are worn correctly or not, they were compared ...

The main constituent of the dust ... not to spend much time outdoors as a first defence mechanism. “If by any way you have to be out then try to protect yourself by either wearing a face mask ...