The Replacement HypoAllergenic UltraFine Disposable Filters for ResVent iBreeze CPAP Machines are exclusively designed and cut to the specific needs of a ResVent iBreeze CPAP Machines.  The intake area of the machine is a certain size and should only use the proper filters designed for that machine to ensure proper filtration. The CPAP machine filter the air pollutants as it provides the user with filtrated positive airway pressure.  Without the air filter, the user would be breathing the air quality that is in the room with no added filtration. These filters are NOT to be cleaned. If one gets wet, dirty or torn, throw it away and replace with a new one. It is common to replace the disposable filters on a monthly basis or sooner depending on the user’s environment. Made in America

USAGE: For optimal performance they should be replaced every 30 days. This usually happens when they appear soiled or discolored.

DIMENSIONS: Approximately 2 x 1 Inches