The first and foremost thing one must have after buying an iPod or an iPhone is the
shell or case to protect the device from dust, scratches, accidental bumps, jerks and the pollution from the environment. This is emphasized because of the reason that though the iPod or the iPhone is a highly powerful device from within, it is quite sensitive and delicate too. It requires a good level of protective cover and that is where the cases and the shells come into play.
Most cases or shells for the iPhone or the iPod have been made from leather or neoprene rubber. Some of the things that you must check out on before deciding on a particular case are - a) durability and strength: having a good durable case is far more important because there is no point in buying a leather case that wears out within days; b) neat-fitting and good grip: the leather case or the shell must fit your iPod neatly and perfectly. Depending upon your need you might go for slide-in cases or flip-cases which let you use the iPod or the iPhone without you having to remove the case completely.
Although the number of varieties and brands has skyrocketed, one thing that remains constant is that people only choose the best quality. Of course after that come the concept of stylish looks and the designs on the cases or shells. Always choose the one that gives your iPod or iPhone the best protection while also providing a good grip on the device because you might carry it with the case.