Van Ness Large Sifting Cat Pan Liners make litter pan maitenance easy. No need for a litter scoop - simply place the entire box of liners in your litter pan with the solid sheet on the bottom using the included rubber band to hold the liners securely in place. Place clumping cat litter ontop of the liners. As litter pan clean up is required simply remove one liner and sift. After 10 cleanings your clumping litter is ready for disposal - using the final solid sheet dispose of remaining old litter and start over.