Naturally Fresh Quick-Clumping Litter is a major advance in cat litter because it's made with walnut shells, which provides superior odor control and has greater absorption capacity than the leading brand cat litters. This super-absorbent formula produces harder clumps than pine, corn or wheat, making clean-up simple and mess-free. It's virtually dust-free so you and your cat can breathe easy and because it doesn't stick to your cat's paws, it won't be tracked throughout your house. What's more, Naturally Fresh is 100% natural and eco-friendly.