Forget socks, you're gonna want hp diapers for your iPod, like the Maroon 5 diaper shown here. Not only will it protect you iPod from blue water, but it will give your iPod a socially embarassing look. Choose from the gallery on the site or create your own.
Remeber always work front to back with an iPod diaper.
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The only drag is that they work for the older iPods only. (covers the buttons on the newer ones) Hopefully, they'll come out with a version for those.