* * Replacement N99 filters: Since the Coronavirus outbreak replacement filters are very hard to get as our supplier is out of stock. Our Customers have said they haven taken warm water in a small bowl with a few drops of Un-scented Antibacterial soap. Mix it up, then dip the filter in 2-3 times (Not letting soak) then lightly rubbing, rinsing and then placing on absorbent paper towel and letting air dry. This has allowed our customers to prolong the use of their filters until we are able to get more in stock. This has not been approved by the FDA, please consult your physician.