Applaws natures calling is a 100 natural and biodegradable clumping cat litter made from the lining of the walnut shell this innovative blend of fibrous material has been proven to effectively absorb and neutralise odour the litter begins to clump on contact with liquid and forms hard lumps within just 15 minutes applaws natures calling is virtually dust free the granules dont stick to your cats paws so they wont leave a trail of litter behind them not only is natures calling 100