Samsung EF-C1A2BBEC Case for Samsung Galaxy S2 Black

Although this practice Samsung original product. It is fine and looks solid. It protects the screen well and although the back is bare, the rubber edge prevents contact with the surface and prevents scratching (of "normal" surfaces at the beach this has to be something else). Another advantage: if you bought a more durable battery Samsung and its shell (EB-K1A2EBEGSTD Samsung Power Pack for Galaxy S2) is spot on.
A default, because it takes one, if you have a base type of charger (dock) will require removing the shell and it is not easy (but that's suddenly good protection).