99.9% dust free. Powerful odor control. Immediate odor control. 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. Product is filled by weight; some settling may occur. Your pet, our passion. The Purina promise. Pets are our passion. Safety is our promise. Progress is our pledge. Quick-release deodorizing system ensures immediate odor control. Absorbency & Clumping in Every LightWeight Granule: clumping power; deodorizing system; absorption power; bright outdoors scent. Less weight, not less litter. Same uses as 20 lbs. 8.5 lbs Tidy Cats LightWeight = 20 lbs leading clumping litter.