This was a fun one that included all the bells and whistles. The concrete slab adds stability, makes it easier to clean, and prevents animals from digging underneath the mesh. The bronze polygal roof keeps out the rain and provides shade from the hot summer sun. The cat door is met with a horizontal shelf to make coming and going easy on the cats. The rest of the structure is decked out with a 9′ sisal rope pole, ramps, and shelves.