Each replacement set includes a premium foam filter and a fiber filter.
Listings recommend replacing the filters every 3–6 months. They are also described as washable and reusable, but allow the filter to fully dry before reinstalling.
They help block dust, dirt, and debris from entering the motor and other internal components.
If you wash the filters, make sure they are completely dry before reinstalling. The listings describe these filters as washable and reusable.