It is a unique formulation that combines the heavy non-tracking granules of Precious Cat Classic with a medium-grain clay. The result is an excellent clumping litter that prevents moisture from reaching the bottom of the tray while providing a clump that will not break down. This cat litter is perfect for multi-cat households and those cat parents with sifting or mechanical litter boxes. With its superior odor control, you can be sure your home will always smell fresh and clean.