If I hadn't tried these on myself, I wouldn't have guessed how little these SportFones weigh -- a mere 2.2 ounces. A 2007 CES Innovations winner, the mp3 player is built directly into the headphones along with a set of simple controls and a rechargeable battery that reportedly will last for 8 hours. I don't know how long you plan on going to the gym, but I hope that will cover you. With a 512MB (figure 150 songs), they use mp3 and WMA music file formats. I liked the "sweat-repelling" ear pads that are washable, and the convenient storage case.

The Jensen JPM-3005 SportFones are available this month with a suggested retail price of $69.99.