This is the SmartCase Quattro4 Wrangler, a rugged case that fully encloses your iPhone, even covering the screen with a transparent glass. It's a two-piece solid design. The best part, however, is the 2000mAh battery pack.
What I like about it is that you can replace the bottom part of the regular case with a part that has a 2000 mAh battery. The manufacturer says that it will more than double your iPhone's battery life. I could have used one of this in my recent road trip across the American Not-so-wild-anymore-but-wild-enough West. [Kickstarter]