SmartCat Lightweight Clumping Litter is 1/2 the weight of traditional clay litters. This litter creates a rock hard clump, that you have to see to believe. Not only is the clumping unbeatable, this litter is also lightweight. This litter technology stops odors on contact, and is 99% dust free. Your cat will thank you for choosing SmartCat Litter.*SmartCat All Natural Litter 100% Grass Litter*This multi-cat formula is not only all natural but designed to make everything easier! Easier to carry, easier to scoop and easier to clean. On top of that we are made from 100% USA farmed grasses, with no chemicals or fragrances. SmartCat All Natural Cat litter is biodegrade and a renewable resource. Our litter is soft on paws and safe for younger cats.*Can litter made from grass out clump clay?*Yes! With the perfect combination of grasses, our litter really does the job. Light in weight but strong in performance, it out clumps clay, every day!