Our Chin-Chiller with its granite stone naturally maintains a surface temperature below room temperature. This cooling quality of granite can help your chinchilla to keep cool and comfortable while simulating its natural environment. In addition, the solid granite washable surfaces are safe and sanitary.Super Pet Hint: To get the maximum cooling effects and to help keep your chin cool and comfortable, always have several Chin-Chillers on hand and rotate them in and out of the refrigerator.