The Exo Terra Reptile Cave is made from food-grade resin and has a very natural and realistic rock finish on the outside. It is coated to prevent the development of harmful bacterial and to make it easier to clean. The neutral color allows for easy integration in desert, tropical or any type of terrarium. The cave provides a secure hiding place that helps prevent stress on your reptiles. The Exo Terra Reptile Cave is very stable and is not easily tipped over by larger reptiles.