Dark hideaway keeps desert reptiles cool while it promotes nesting. Safe for any environment, terrestrial or aquatic Authentic Look, Designed For Easy Care Zilla Shale Rock Dens satisfy a cold-blooded reptile needs for a cool burrow, in a form that offers easier care than natural rock. Ideal hiding places are cast into each den, which is finished in a realistic patina that resists bacterial growth and cleans easily with warm, soapy water. Dens are crafted of a weighty material that keeps them firmly in place. Their authentic look will be equally at home in desert, forest or aquatic habitats.