it keeps litter in, making it excellent for cats who love to dig and kick litter. this litter box lid is great at catching stray litter that clings to either the kitties’s paws (3 cats – 4 different litter boxes) or behinds as they exit the litter box. i just gave this litter box away because it was really tough to wrestle off the lid when it was time to scoop and clean it. i would and did deduct one …