The basic shape of the case is pretty much the same as any other playthrough case, but iSkin put some of its own tweaks on it. To start, a patterned print on the outside of the case adds a subtle visual element, as well as a little bit of grip. The same goes for the raised waves coming up about five inches from the bottom on either side. Blue, black, purple, pink, and red versions are available, each of which is translucent. As a case of this style…