Fresh Step® Ultra Unscented cat litter is powerful for even the busiest litter boxes. This Ultra unscented cat litter is specially formulated to prevent bacterial odor and has low dust for clearer air and cleaner surfaces. The litter contains carbon to eliminate and trap odors for 10 days guaranteed. Activated carbon traps and eliminates odors from urine and feces. The high quality, clumping clay quickly locks in liquid and traps odors, forming ultra tight clumps preventing stinky crumbles after scooping, making cleaning fast and easy. This 42 pound package is the perfect size for homes with multiple cats. To refresh and maintain your kitty litter box, every time you scoop just add more Fresh Step® unscented cat litter.