Purina Tidy Cats LightWeight Instant Action clumping, scoopable cat litter. With an innovative formula that traps and prevents ammonia odor for 21 days (when used as directed), this multi cat litter offers protection at a fraction of the weight of regular litter without sacrificing litter amount. Tidy Cats litter defends your home against strong smells from the litter box with immediate odor control that helps maintain an inviting, fresh-smelling home. The lightweight litter is easy to carry, weighing 50% less than the leading clumping cat litter and provides a clean and easy pour. The low dust cat litter is 99.9% dust free and forms strong, tight clumps for quick and easy scooping, while every patented granule features immediate odor control with powerful absorbency and tight clumping.