Naturally Fresh Multi-Cat Clumping Cat Litter is an eco-friendly clumping litter made from all-natural walnut shells. Walnut shells have the unique ability to control ammonia odors, meaning Naturally Fresh neutralizes odors organically without relying on harsh perfumes. Sustainable & Upcycled, Virtually Dust-Free and Low Tracking. Proprietary Natural Malodor Counteractant Controls Urine and Fecal Odors. Homegrown in the USA. Clay Free, Corn Free, Grain Free. For Households managing litter boxes with multiple cats.