Zer-Odor by Penn Plax is an all-natural urine deodorizer. These pure zeolites are a natural mineral that absorbs strong odors on contact, is unscented, and 100% non-toxic. Provide your petite pets a comfortable, healthy living environment by simply adding this odor reducer beneath their bedding material. Just sprinkle some on the tray of the cage and cover with the bedding you desire, and you are all done! Quick, easy, and super safe!