There are some kitties who would love to stroll outside in the yard and take in the sun. But allowing your cat to roam free outdoors is not a good idea, since the dangers far outweigh the benefits. Kittywalk Curves allows your cat to experience the outdoors in a safe and contained environment. These 45-degree arcs, made of rip-stop collapsible netting, create a fun little backyard obstacle course. There is a door attached for an easy entrance. Kittywalk Curves are available in a set of two or a set of four arcs that can be attached to one another.