the more I use the  go - Waterproof \/ Sweatproof \/ Sports MP3 Player Headphones - 2gb - in-ear Earbuds Style -lrb- AKA Wave -rrb-  at first , it take a few swimming session to figure out which ear bud best fit my ear , but ever since I figure it out , its be great . I recently institute a run regimen into the day I swim and I go from swim to run or run to swim without even take they off . Pretty cool if you ask I . sometimes they loosen up in the water , but that not often since I figure out which bud to use . I use to run with my iPhone , and now its just weird not carry one lol , but I can not say much more to how much I have enjoy this purchase . if you want to know , I have be run on a treadmill or elliptical . when the weather warm up , I 'll probably switch back over to the iPhone because I can use RunKeeper outside . for now , I be very happy ! \*\*\*\* EDIT \*\*\*\* so I add some song on the player and forget to screw the little cap thing to seal the usb port . I jump in the pool and boom , it stop . my fault . now I be piss I have to buy another .