Of this grouping, the most basic and least expensive is Cygnett’s Second Skin Silicone Case, available in red or black. It’s a thin piece of crosshatch-textured rubber that wraps around the iPod’s body, covering everything except for the screen, headphone port, and Lightning port. This means there’s full button coverage, and the material is thin enough that they maintain their full tactility, which is always a factor we appreciate.…