Purina Tidy Cats LightWeight Clumping Cat Litter One (1) 17 lb. Pail - Purina Tidy Cats LightWeight 24/7 Performance for Multiple Cats Clumping Dust Free Cat Litter 100% dust-free formula Prevents ammonia odor from forming for two weeks when used as directed Lightweight formula is 50% lighter than the leading clumping litter Tight, strong clumps for easy scooping