We did get a little leakage inside the care but a piece a paper towel took care of that. Easy to take of and slip into. All I can say is BEWARE! They stay in place and they are great when Im exercising on the treadmill or on the elliptical. It gives the space saving features I wanted because of its design that beat out a number of the other comparable products that make storage horizontal. 25 4N oxygen free copper plating silver15. These still look brand new after I threw them in the washer yesterday. Still retaining the same acoustic detail which is hard to do with ANC; normally this becomes very muffled and watered down, not with the MW65 though. This stress point is most certainly caused by the poor construction at the joint. So it is what it is.