"regular masks" which just ear loops or NIOSH N95 with straps that go around the back of your head? "regular masks" that you buy and put on or NIOSH N95 masks

"regular masks" which just ear loops or NIOSH N95 with straps that go around the back of your head? "regular masks" that you buy and put on or NIOSH N95 masks with a proper fit test to make sure you have the correct size and are wearing it correctly. You can make a mask fit tighter with a mask brace or mask seal. https://making.engr.wisc.edu/mask-fitter/ https://making.engr.wisc.edu/mask-fitter/