The daily mileage and the hours I spend in these shoes means that I am well acquainted with these shoes. I bought them because they were wireless and have a charging case. These ear gels improve the fit for me. I read other reviews who said the design had rubbed off on theirs, but mine is still holding on strong. Quedan bien en la montura veremos a ver la durabiidad en el sol. That makes them unsafe. This case is very protective but there are some things that make it not as desirable:You have to open or take out the changing case in order to plug it in for charging. Also, either the cord or the earpiece cushions seem to make me muffled on my microphone. My son wears these as “inside shoes” at his Montessori school. Earphones were very comfortable, especially using the memory foam tips.