Size: 16 lb It started with a question: What does a cat track out of the litter box Boxiepros boosted blend of probiotics deep clean your litter on a microscopic level 24/7, so your cat won't spread unseen waste to kitchen counters, beds, and other areas of the home. Boxiepro also prevents odors caused by bacteria, helping to keep your home fresh and odor free. Cleaner paws = Cleaner home is about peace of mind and a more hygienic home for your family. Includes all the great benefits of Boxiecats extra strength litter formula.