Replacement Litter Box Filter for your covered litter box. Uses Zeolite Charcoal particles to trap airborne odor molecules inside the litter box enclosure. Absorbs odors & keeps air clean while being nontoxic & easy-to-load. | Activated charcoal is able to absorb and trap the odor by binding to it in this enclosed litter box. Zeolite has a cage-like structure and works with the charcoal to trap odor molecules for protection from unwanted odors in your kitty litter box. | Minimizes cat box odors in cat litter so your home smells clean and fresh in your covered cat litter box. Litter box with lid keeps kitty litter hidden. An important addition to your cat supplies for indoor cats. | This Booda Clean Step Compatible carbon filter replacement for your hooded litter box will absorb unwanted odors for up to 3 months. Precise fit for your cat litter box with lid. Made to replace the Petmate clean step litter dome filter. | Nontoxic and easy to load into your cat litter box so you'll have more time to spend with your furry friend.. Specifically made compatible with Petmate charcoal replacement filters litter box. Not a petmate booda filter.