Very good comfortable and effective product! For optimal qualitée do hesitate to properly drive in the ear (I think the secret and to align them with the axis of the ear canal), so he is sometimes a little hard to get (at least with my ear shape) because the nipple is not very long, but suddenly there are relatively discreet ... After four days of my ears thank the festival, he also used to work on my starts because with their linear filtering and relatively good comfort I have no need to put and remove every five minutes;) I have not had the opportunity to compare them with the ER 20, the tapping and certe worse than without cap (I think we all lose some subtleties of the same) but the result and convincing, even essential for some concerts, especially in some small concert in basements where we head in pregnant! I bought two boxes like this with the additional cap it made me a free pair I can lend. In conclusion, should all have a good pair of hands raised to plug;)
