It is very important to keep in mind that doing so might lower its efficiency in time. KN95 masks what's the difference between N95 masks and KN95 masks why You Ought to Begin Putting on N95 Masks Right now. KN95 N95 mask vs KN95 compare prices. Dust masks are designed for protecting against dust and other small particles like sawdust. Wear one whenever you do anything that could irritate your lungs. Especially if they've already been unwell, keep a close eye on their body temperature and don't hesitate to contact an ambulance if they show any unusual signs of illness.