It feels like your feet get massaged as you walk. I tried them in my Denon AVR-1906 amplifier and was bitterly disappointed. Es wurden die Kopfhörer ehr selten benutzt vielleicht ca 1 pro Woche. 127spl is not a lie. The lock and support that comes with it is an added bonus 5 was to small. PUT THEM IN YOUR CART AND DON?T EVEN THINK TWICE, HIT ?PLACE ORDER?. Not just with my phone but pairing between the two ear buds as well. Will never order these again. I really like how compact the size of it is.