Shell Gel is a thick case, thanks to a layer of shock absorbent rubber found on the outside of the hard plastic piece. Otherwise, the hard frame is pretty straightforward, wrapping around the edges of the iPhone 5 and fitting into a groove in the rubber layer. The inner core is rather protective, covering the device’s top and side edges, plus some of the bezel. In addition to offering button coverage, it’s a bit thicker at the corners…