content: Bought these head phones for running. One month later the left side no longer works after using them only a few times. The cord entangles itself after every use no matter how carefully you put it away. The ear cups are very difficult to seat correctly when changed and as a result I lost one of the sponge cups after changing it even though I took great care to seat it correctly. Despite the various cups to size the phones correctly I never found a good combination to make them secure while running thus they were either falling out or uncomfortable. I am currently looking into getting my money back.