I bought a pair of these last year when I was doing physical therapy for my left knee.  I bought them 'on the fly' because I had to get to therapy in a hurry and they were the only ones available.  Two words - BIG MISTAKE!   The only two good things about these on-ear headphones are (1) the ear pads on these feel really good (which is not usually the case for me - most on-ear cans I've donned squeeze my ears against the arms of my glasses within the first 10 minutes, and that hurts!); and (2) the noise cancelling is quite decent for a cheap pair...