Swimming is a great sport, but up and down, up and down the length of the pool can be dull. No music, no sounds of the world, just the rush of water passing your ears and the occasional announcement over the Tannoy.

The Finis SwimMP3 (yes...

Conventional heart rate monitors fall down in two areas when swimming: firstly the chest strap isn't always compatible with those long reaching pulls; secondly, looking at the display while swimming can really put you off your stroke.

FINIS...