The three activities reptiles enjoy most: basking in warmth, climbing and relaxing in a cool burrow. Each shelter is made with non-porous exterior surfaces that are easy to clean with soapy water. They will not retain water or promote bacteria so terrariums stay healthier and smell fresher longer. Safe for both aquatic and terrestrial environments. Naturalistic appearance of natural wood bark blends in with terrestrial or aquatic environments Satisfies the need for burrowing animals to instinctively dig, find privacy and overhead coverage Set open ends alongside the glass or look through the window at the top to get a fascinating glimpse of activity Non-porous exterior resists bacterial growth Easy to clean - wash with warm, soapy water then rinse Product Dimensions: Medium: 8.3" x 3.6" x 3" Large: 11.1" x 5.5" x 4.8"