HEPA Filter for Flex VacuumThe Flex Vacuum has three filters, two of which may need to be swapped out over time. This is the HEPA filter that goes on the base of the motor unit. HEPA filters make the vacuum hypoallergenic and take all the bad stuff out of the air. This filter is made of fleece coated with Teflon ensuring that it lasts for a very long time. The Teflon coating makes the surface dirt repellent and prevents the filter from getting clogged. You can also clean this