Naturally Fresh Quick-Clumping Herbal Attraction Litter is formulated with a blend of natural herbs that have shown to be effective in attracting cats to their litter boxes. It's ideal for kitten training, senior cats, or households with litter box acceptance problems. Naturally Fresh litters are made from the brous material found in walnut shells, which has the proven ability to organically absorb ammonia odors better than other leading litters. Because it's biodegradable and produces zero waste, it's as natural as it gets for your cat. Friendly for the environment, your cats, and you.