Meet the Kittywalk Cozy Climber: a 5-story climbing unit for cats. You can mount it to most closet doors to provide your pets with some space to relax. It has 5 levels for your pet to climb and play. The portholes give you easy access on each level. The Cozy Climber also has a privacy parlor with washable fleecy platform pad. Like what you see? The Cozy Climber sets you back under $200.