SwiMP3

The SwiMP3 consists of swim goggles with an MP3 player using headphones that rest flat on the cheek bones, between your ears and your eyes, so that you hear the music through bone conduction rather than through your ears.

Music breaks up the tedium of lap swimming, of course, but even better is the fact that it encourages proper form. It sounds better when your head is in the water, so I keep my head down.

-- Bill Altreuter  

SwiMP3 2G
$101
Manufactured by FINIS

Available from Amazon