Continuous odor control. Low dust. Tight clumps. America's No.1 litter brand based on sales. Backed by 70 years of litter expertise. Our history began when Ed Lowe invented litter in 1947, and reinventing litter has been our focus ever since. Combining our litter expertise with everything we learn from you, we're proud to keep growing our innovative portfolio of litter products. Slow-Release deodorizing system ensures continuous odor control. Absorbency & Clumping in Every Patented Granule: Clumping power; Absorption power; Deodorizing system; Clean linen scent. Purina - Your pet, our passion.