A set of Tokachi Zeolite in the Kyrrite. This product is made of natural materials that have greatly improved the adsorption function of ammonia while maintaining high moisture control. What is dergarten diatomaceous shalerock? Diatomaceous earth is a stone based on the basement of diatomaceous plankton, which is a special ingredient in northern Hokkaido. Because of the countless holes, it has excellent moisture control and deodorizing capabilities, and releases far infrared rays.