1Made of pure natural pine bark, which makes it safe, environmental friendly and healthy. 2Natural bark can well control the temperature and moisturize the pet environment and regulate the temperature and humidity. 3The pine bark has a natural fragrance, which can ensure that there will be no unpleasant smells such as feces in the pet box. 4With high cost performance, reusable, washed by clean water and sun exposure than can be used again. 5Very suitable for reptiles, amphibians and invertebrates who like humidity, swallowed can be excreted with crawling pet feces.