Premium Carbonclay is “clumping” cat litterforremoving cat urine odor. Activated charcoal isphenomenal forremovingthe smell of cat urine. It has afast-clumpingfeature due to the granule size. Itcan instantly absorb the unpleasant smell coming from the litter boxes. It prevents moisture fromcollecting on the bottom of the tray where it can decompose and cause odors.It is an excellent cat littersubstrate, as waste clumps can be scooped out and filled in without changing the entire litter box. Thehard clumps that form allow you to scoop out waste easily, leaving a fresh, clean tray.