The Koss headphones are absolute top. I did not think that a pair of headphones in this price range offers such a great sound experience, super bass !! Compared to the standard in-ear headphones to iPod nano much the besser.Als is particularly positive I have the comfort empfunden.Die headphones are lightweight and disturbs no button in the ear. The only minus point is in my opinion the fragile process to watch. Always be very careful with the headphones.