The shell is straightforward, made of a semi-hardened rubber that slips right around the body of the iPhone 4; it’s rigid enough that the back and sides hold their shape. Twelve ribs line the outside edges to provide some grip, and both the Sleep/Wake button and volume controls are covered with ridged polymer for protection. As has become traditional for iPhone cases, there are openings for the headphone port and mic, side switch, rear camera,…
