The octagonal mesh top is designed to fit all MidWest Homes for Pets and New World Exercise Pens, as well as most other metal foldable exercise pens. By adding this mesh top to your dog playpen, you can create a shaded, comfortable area suitable for dogs, rabbits, guinea pigs, and other pets. It is important to note that this mesh top can only be used when the playpen is set up in an octagonal shape. The mesh top features convenient hook and loop technology, making installation quick and easy. It also includes a door panel for effortless access to your pet at any time. The durable poly-mesh fabric offers privacy and enhances your pet's experience, whether indoors or outdoors.