AlfaPet's 10 Sifting Elastic cat pan liners are made with holes to swiftly sift out your cats litter waste while allowing the clean litter to filter back into your cat's litter pan. You simply lift the top liner to sift leaving the clumps in the bag for disposal. After using the 10 sifting liners, AlfaPet's pack includes a solid bottom liner, so you can re-fresh and start over with a new pack. These liners are designed to be used with all types of Clumping cat litter. These liners use our patented Sta-Put technology to safely hold the liner in place on the pan. These liners fit most Large, X-Large, X-Giant and Jumbo pans.