Get the most out of your cat litter with Ultra Clumping Crystals Cat Litter. Made with sand-like silica gel crystals, which are a naturally occurring mineral made of water, sand, and oxygen, it offers superior moisture and odor-trapping qualities. Cats will love the soft texture on their paws, and you'll love the easy twice-a-week scooping. The ultra-fine consistency is 70% lighter than most clay litters, and its non-toxic and safe for your beloved cat.