Sena Sarach UltraSlim Leather Pouch for iPhone 4 and iPhone 4S, Black/Grey
This sleeve is so perfect, there really isn't much to say.  The construction is very nearly perfect (you can see where they tie the stitching inside the case if you look to the bottom - lol, makes no difference).  Leather outside, some sort of smooth lining, fits perfectly!<br /><br />With only the one open end, the case should a lot of protection from scratching and some protection from impact (assuming enough luck to not land on the open end).<br /><br />As a note, this case fits perfectly on a naked iPho