Always double-check the expiration dates on all face masks! KN95 what is the difference N95 and KN95 the Cost effective Treatment Act of 2010 ( ACA ) calls for companies to supply their staff members with wellness insurance coverage. Small size small N95 once you've finished using it, wash out all filters with soap and water before storing it properly. We tend to think that it's okay once they stop being sick because then there will be no more germs. Additionally, counterfeit masks may not fit properly, which can allow dangerous particles to enter your lungs. Lung cancer.