Washable Featherweight Filter. Filter for cleaning carpets and hard floors. Reduces dust, pollen, and other allergens in the air. Compatible with the Featherweight series. The filter can be rinsed with cold water - allow it to dry for 24 hours before reusing. Replace your filter approximately every 6 months depending on usage. Properly maintained filters help reduce the reintroduction of dust, pollen, and other allergens into the air. The filter should be emptied into an open trash can after each use to maintain product performance. Wash it with cold water if necessary and let it dry for 24 hours before reinserting it into the machine. The filter is easy to remove and replace without any tools.