This clumping litter is made entirely of natural clay. With its patented Smart Odor Shield technology OdorLock blocks ammonia release uniquely neutralizing urine and feces odors for 40 days. Its excellent absorption rate and its fast and powerful agglomeration facilitate cleaning. OdorLock generates less waste than competing clay litters: you ll use 45% less litter per year. Plus it s 99.9% dust-free leaving no trace on floors or furniture and keeping your cat s airway clean. and your family. She is soft and comfortable for your cat. Specifications Capacity: 25 lbs