ARM & HAMMER Ultra Last Cat Litter 20 lb box provides powerful long lasting odor control that keeps working even when you can't scoop. Rock solid clumping makes removing the source of odors easy to help keep your home smelling fresh. Each granule in this ARM & HAMMER Ultra Last Cat Litter 20 lb box is coated with ARM & HAMMER Baking Soda. 99.9% dust free and low-tracking. Ingredients: Moisture-activated Micro-Granules, Baking Soda