waterproof MP3 player

my future new toy for when I do this:
500 free
100 kick
200 back
100 kick
100 back
200 free pull
100 breast stroke
200 IM
100 back
200 free
and not go absolutely batty with the last radio played song on a constant loop on my noodle. Not my best day of swimming, but I'm sure I'll go further when I'm fulled by the sounds of vampire weekend, tapes and tapes, cold war kids and a little static x to keep me company...