To maintain a healthy environment for your pet it"s important to keep his living area clean, dry and comfortable. With your pet"s comfort in mind, Vitakraft created a soft new bedding material made from recycled paper and added Zeolite for supreme odor control. Zeolite is a naturally occurring mineral which acts as a molecular sponge to absorb ammonia and other wastes, trapping the very materials which cause pet odor in the first place!