Tomplus Aluminum Case ($18)
Next, we have something a little unique and different. This certainly isn't the smallest case or the easiest to hold, but it's durable and made almost entirely out of aircraft grade aluminum. Yes, aluminum.
TomPlus offers its metallic aluminum cases in six unique colors. Each case is shock, dust and water-resistant, on top of the phone being water-resistant as well. It has a large lip around the entire device to keep it safe from drops or abuse.
Another benefit is the case has extra space on the bottom that routes the down-firing speaker to front-facing speakers with two cutouts. Giving you improved sound that almost sounds like two speakers. In reality, it works better than expected.
Again, these cases aren't small by any means, but they certainly are rugged.