2. Snow Lizard SLXtreme
Snow Lizard's SLXtreme iPhone case offers shock protection and remains waterproof in up to six feet of water. It differentiates itself from other cases because it has an integrated battery that can recharge your phone. In addition, it's equipped with a solar panel to replenish the case's battery if you ever go off the grid, making it perfect for adventure-seekers.
The SLXtreme for iOS retails for $149 and can be purchased directly from Snow Lizard's site. They also make a model for iPads and Galaxy phones.