Keep furry little paws from tracking scat out of the litter box with the Cleanstep Cat Box from Booda. The design removes litter from paws to eliminate mess, so the cat can dig to his heart's content without scattering the litter from the box.. Designed to accommodate cats of every size, the Cleanstep is covered for privacy and cleanliness. A built-in air filter removes 99 percent of odor. Fifty percent bigger than average litter box, the Cleanstep measures 21 by 21 inches (height by diameter), amd accommodates two cats easily. A paw-cleaning ramp keeps the litter in the box, not on the floor. A built-in handle means easy transport and disposal. Easy-to-clean plastic construction and a disposable liner (more sold separately) lets you spend more time petting your feline friend and less time scrubbing the litter box. The purchase includes one filter and liner. A filter hidden in the dome top of this litter box is the secret to outstanding odor control.