Open mesh windows gives pets a great view of the outdoors. Comes with a removable plush microfleece pad plus the top of the Penthouse is lined with microfleece for comfortable resting. Can accommodate multiple cats with the extra strong suction cups provided. Removable cover for easy machine wash care. The EZ Mount Penthouse can be removed and stored easily with its collapsible design and is hands down luxury built for the most pampered cat. The purfect window mounted entertainment room for your kitty Built-in ledge for easy entrance and exit Mounts to most windows or glass doors Accommodates multiple cats with the extra strong suction cup system