Habitrail Cristal habitat is constructed of plastic and wire to provide durability and optimal air circulation. The deep base has rounded corners to minimize mess and make cleaning a breeze. Large plastic door allows easy access and includes a lock to keep your pet securely inside. Two "windows" allow you to connect other Habitrail accessories. Habitrail Cristal features a look out deck with ladder; a quiet exercise wheel; a chew-proof water bottle with stainless steel tip; a food dish; and a litter guard.