Arm & Hammer Ultra Last Clumping Cat Litter offers long-lasting odor control litter designed to continuously neutralize odors, even between scooping. Each granule is coated with baking soda and odor-sealing ingredients to provide extended odor protection so the box stays fresh longer. It forms hard clumps upon contact with moisture for easy scooping and leaves a light fresh scent in the litter box, helping your home stay odor-free.