Meet your heavyweight odor fighting champion. Fresh Step Heavy Duty Odor Block Cat Litter offers 3x odor eliminating carbon with Ammonia Block technology (1), which fights odor 3x as long (2) as the leading clumping litter brand. The longest lasting odor control from Fresh Step (3), and the only litter brand backed by the power of Febreze, this litter helps keep your litter box smelling fresh for 30 days. Made with natural clay enhanced with odor fighting power, this low dust formula helps ensure clean surfaces and a pleasant experience for both you and your cat. Compatible with automated litter boxes, this clay litter forms strong clumps for easy cleanouts. Strong enough for multi cat households, one box of this clay clumping cat litter lasts about one month per cat based on average purchase cycles. FEBREZE is used under license from The Procter & Gamble Company or its affiliates. (1) vs. Fresh Step Odor Shield. (2) On fecal malodor. (3) Among Fresh Step clumping litters.