Jack Welch wrote a review of Beats by Dre PowerBeats Sport Headphones on August 25, 2011
These headphones sound great. No doubt about that. Alas my one gripe is that the headphones slip out of my ears when I am running. I personally sweat quite a bit and I have only used in the summer where I am prone to sweat even more. The clip that is attached to the headphones does help quite a bit but I am still having to periodically adjust them.