Used for 5 months on the excellent MP3 iAUDIO X5L. I replaced the original ear because they do not when I ride my bike, and I do every day to go to work.

The sound is not bad, worse than the original headset, but better than other foam systems I tried, especially as most headphones in the same price range. They cash in the volumes necessary to use a city without exhausting, but it lacks a little definition: it is not very focused midrange and super super ventilated, but enough to begin to enjoy music with bass, treble , dynamics.

It is enough in the ear for the use I make, even if the foam systems are not, by far my favorite. It still moves a bit and then it's weird in the ear, it's pretty annoying to put on, it takes a little wax (sorry but true) ... but hey it's still usable even if not the top-level comfort, and still is what suits me best use (true headphones too dangerous to bike). In any case, it does not irritate the ear canal, which I was most afraid at first because I am quite sensitive on that side.

As the brothers: solid flat side, unclip it is a little, but it resets easily. The son quickly kinks, the materials are top ... But it's still ultimately a good value from my point of view (14 € on the net).

Only point on which I can not find a good solution: even pushed in, the term still strong enough that the wind is taken in the ears as soon as it reaches a low speed ...