Petmate® Litter Box Liners are disposable plastic liners that make cleaning a cat's litter box a snap. Their dependable construction is tear-resistant and keeps waste from caking to the inside walls of a cat's litter box while allowing you to carry out large loads of litter. INSTRUCTIONS: Spread liner over litter pan so that it overhangs rim on all sides. Press the center of the liner down to the bottom of the pan; and smooth outward. Fill the pan and liner with litter according to package directions. Sift out solid waste daily. To remove litter simply lift the liner from all sides; gather above the pan; and tie.