The four ifrogz cases actually consist only of two distinct case designs, sold in separate versions for the iPod touch and iPhone: one is called Wrapz or Silicone Wrapz, and the other is called Treadz ($20 each). We?ve reviewed both of these cases before for earlier iPods; the major difference here is just in size and appropriateness. In simple summary, the Treadz case looks like a flattened car tire, and the Wrapz case is the latest generation?

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