I need a cheap pair of headphone for run with my iPhone with the runkeeper app while play music . the Apple earbud would shift in my ear while run cause uneven sound . plus , they do not sound that great . these Koss headphone fit the bill perfectly . they stay on nicely , securely , and comfortably , even with glass on . the sound quality be unmatched at this price -lrb- I be sort of a headphone fanatic , own headphone of all sort include the Audio Technica ath-m50 , Shure SE530 , etymotic er-4p , Grado MS1 , etc -rrb- and these headphone , at a fraction of the price , have really satisfying sound . fit be important because if they be not clamp on securely enough , you will not get adequate bass response . it be tricky to put on at first , but once you get the hang of it , it only take a few seconds .