Jonny Cat Jumbo Scented Drawstring Cat Litter Box Liners Heavy duty 2 mil thick tear resistant plastic. The convenient drawstring makes it easier to remove the litter. Made with thick plastic (2 mil) that helps prevent odor-causing waste from sticking to the sides and bottom of the litter box. The pleasant scent of the liners helps to keep the litter box smelling fresh. They fit most litter boxes.