Scented clumping litter made up of ultra-absorbent clay grains (absorption levels 280 -330%). In contact with liquids, it immediately forms very compact blocks, leaving no room for the development of bad odors that you can easily remove each day, leaving a completely clean and dry litter box. Clumping litter will last you much longer (several weeks) and you only have to put some back in the box when you remove the clumps. In addition, a high-end clumping litter (like City or Extreme Classic) is less dusty; it is therefore ideal if you or your cat are sensitive to dust.