what a joke. in no world should you ever have to wear 2 masks.if your mask isnt good enough you dont double it up you get a better grade of mask. all this mask bullshit pisses me off. i have worn respirators at work for over a decade. the rules the health dept assholes are making up would get you fired and fined by workers comp rules .try showing up to grind metal or sand wood with a cloth mask over your face and see how fast you get sent home. but hey it should be good to stop virus particles. gtfo