Cats Pride Liners are easy to use, the convenient drawstring makes tossing the litter out easier. Just pull, close and toss. Built to last, liners have to work as hard as litter, liners are heavy-duty and tear-resistant, so cats" claws can"t rip "em. Strong and durable, made with thick plastic that prevents odor-causing waste from sticking to the sides and bottom of the litter box.