This product is made of bentonite clay. The bentonite for cat litter are formed after special refinings, whose color vary from white,colorful to mixed colored. They exist in spherical, cylindrical or unshaped granules.They have many characteristics,such as strong absorption ability. Besides, they become solid speedily and get rid of the disgusting odder. What's more, they can control the bacteria growth and keep the fresh air. Therefore, they are beneficial to the healthiness of pets (such as for cats) and they are the ideal beds for pets.