Blac kThe CatMate litter mat is designed to be used with CatMate litter or any type of litter. The mat consists of two layers of waterproof material that will collect litter that scatters from your cats pays as they leave the tray. Simply place in front or under your cat’s tray. When required simply pour the litter back into the tray or dispose. Double thickness – a top layer with small holes and a bottom layer to catch the litter reduces tracking Waterproof and durable can also be used as a scratching or resting mat.