Now I take them at each concert. Everyone asks me what it is that little white box ^^. I was purple with cords that were already better than foam, but now the difference is actually meant. After 2 hours I do not have bad ear. The sound is good and acute filter, very, very unpleasant pdt concerts. The little "stick" to them is practical Perhaps seeing the shape of the box for use on stage (ie with lots of people moving!) For quick storage +