Catsan Smart Pack is the only inlay pack for your cat's litter tray consisting of a super absorbent liner sitting beneath a layer of Catsan Hygiene Plus cat litter. There are two inlays in a pack which is as efficient as 30 liters of conventional non-clumping cat litter. Thanks to the cat litter tray liners, liquids are absorbed and locked in quickly, stopping bad odors before they can develop. Catsan Smart Pack inlays are suitable for domestic cat litter trays. Catsan Smart Pack cat litter is totally dust free, and is suitable for indoor adult cats and kittens. Catsan Smart Pack doesn't mask bad odors - it stops them even forming, The liner absorbs and safely locks in liquid, keeping the litter noticeably dryer for longer and improving odor control.