content: I have purchased 7 or 8 different cheaper headphones to wear while running at the the gym. I have normal sized head and ears, but I sweat a lot. These were the worst of the various models I tried. It is possible that I never figured out the proper way to wear these, but having tried every fitting that came with the set, the headphones ranged from worthless to excrutiatingly uncomforatble. Along with the PMX70's also from Sennheiser, these are the only headphones that I have tried that I did not at least find an alternative use for for the ones that proved to be not worth wearing to the gym.