Signature's Grain Zero Cat litter is made with a hard clumping medium-grain clay that prevents moisture from seeping into the tray's bottom and minimizes tracking. The clumps are durable, so scooping litter is hassle-free. This low-dust and hypoallergenic formula is suitable for cats and their owners with allergies. It's perfect for households with one or more cats, and it effectively controls odors with a lavender scent that keeps your home smelling clean until the next litter box cleaning.