While it's not H2O Audio's first water-ready armband, Amphibx ($80) is the company's first to be both iPod- and iPhone-agnostic, as well as the first not to require a separate hard plastic case for the device inside. While the large version is made to fit the iPhone, iPod touch, and full-sized iPods, the medium version is designed to fit the iPod nano and similarly small devices, holding them loosely inside of a watertight, touch- and see-through…
