Sarah of the fitness and healthy lifestyle blog, SkinnyRunner recently put the Koss Fit Series headphones to the test. Sarah was able to test both the FitClips and FitBuds in various workouts and environments. Check out her review of the Koss Fit Series on her blog, SkinnyRunner by following the link below, http://skinnyrunner.com/2013/05/16/win-a-pair-of-koss-fit-series-headphones/