Fresh Step Advanced Clumping Cat Litter guarantees 10 days of odor control and is available in the Gain Original scent that you love in a 99.9% dust-free formula. This advanced clumping cat litter with Ammonia Block Technology is our most advanced odor protection formula yet. Fresh Step Advanced cat litter starts fighting odors on contact to control odor longer (vs. Fresh Step Gain regular formula cat litter). Fresh Step Cat Litter uses the power of Febreze to block litter box odors with activated charcoal to guarantee 10 days of odor control. Made with a cat-friendly formula, this 99.9% dust-free formula helps keep surfaces cleaner and air clearer with your cats health and happiness in mind. A paw-activated Gain Original fragrance is released every time your cat uses the litter box, providing fresh scent as needed for your home. Certain trademarks used under license from Procter & Gamble Company or its affiliates.