I am an avid runner (3-4x per week), and in each run is my Ipod case. For almost 6 years, I do not use the Sennheiser Sport Headphones but out of conviction, but because "among the blind the one-eyed man ....". I consume usually a headphone of this type per year. Despite used properly working after about 4-5 months, only one side and now to about Xten times. The quality is getting worse from year to year ... the headphone act always cheaper in the appearance and materials. But what what alternative is there else on the market? Have it with cheap headphones tasted (10-15 EUR), quasi to "throw away" and make trouble. But this sitting of something bad and go broke fast, so it is computationally just not worth it.