This cat catio comes with 4 wheels for easily move. Two of wheels are brake casters to fix well and keep safe. Waterproof asphalt roof are perfect for outdoor and indoor use. Upgraded version of the surrounding reinforcement wooden strip structure make the product more robust and durable. Three tier cat playpen with 5 platform and small resting house to make much fun for pets. Cat house with removable bottom PVC layer for easy cleaning. Two big front doors and 2 small pulled up access doors with hook for easy catching you cats. Install the upper part on the reverse side to face the indoor window to connect the house. This allows your pets to enter freely in & out through the enclosure.