The problem for avid swimmers is that they don't have the luxury of listening to music underwater -- that is, until they get the Speedo LZR Racer Aquabeat MP3 Player on their hands.
The Speedo LZR Racer Aquabeat MP3 Player is one of the many underwater devices that allows swimmers to listen to music while they're in the water. The device is waterproof at depths up to 10 feet. These are strapped onto your goggles, which means you don't have to worry about your arms getting caught in the wires as you're doing laps. There's a built-in rechargeable battery that delivers eight hours of continuous playback and 2 GB of internal memory; it also comes with waterproof earplugs. It's worth investing in if you like to work out underwater while listening to some tunes.