The cheekily named Wonderful Things Factory is shipping perhaps the slimmest iPhone case in the world that also incorporates a built-in clip. They managed to do this by slicing a gap through the back of the case, creating what the casual observer might think was a broken case. But the SlimClip is a clever design move that makes for an extremely thin case, with a backing that serves double duty, protecting the back of the iPhone, and acting as a clip. As long as you're clipping the SlimClip to a slim piece of clothing, like workout wear, it works great. A thick belt or denim jeans might be too thick, but it does work.
Despite the thin design, the case protects the front glass by providing a lip above the screen. The SlimClip could prove to be quite useful to active users who don't want the bulk of a typical rugged case. I also like the texture along the back, which is hard plastic but feels like rubbery nibs, which should help users keep a grip on it. After all, the best way to protect an iPhone is to avoid dropping it in the first place!