Odor-Neutralizing Carbon is bonded to premium clay granules. Carbon eliminates odors by grabbing and holding them to its surface. Maximum Clumping Power. Ever Clean® super premium clumping cat litter helps prevent liquid waste from reaching the bottom of the litter box where it can decompose and create odors. Ever Clean® litter is made from a premium blend of natural minerals and clays. We select only pure, high-quality ingredients.