Have an Apple iPod and the problem of the normal enigmatic motives headphones do not think in my ears when I move. Had a year ago already Sennheiser headphones and could even then confirm the credibility of any goods versprochende good quality of Sennheiser products. However, the old earphones were ironing and pressing on the ear. So I resorted to these headphones, and am thrilled not only the sound has improved a lot totally absorbed over regular headphones, no ambient noise. The headset fits perfectly to your ear and provides both a good bass sound and high clean tones. These headphones are also very good to use for sport, as they hardly slip out of the ears. Use these every day while jogging. The only criticism is that there is no external volume control on the headphones. But that's only a minor complaint does not detract from the very positive evaluation of this product. For sports enthusiasts, music lovers and people where other headphones do not hold absolute buy recommendation !!!!!!!!!