Found a plastic pole, from the gel piece had broke off and was still in the base and the decrease volume button had actually broken off the board and the operating switch had come out rendering the headset useless. None of the lights indicate this, being that theyre blue and they are supposed to change to red or green when in use. This case seems to be mostly plastic, I?m not sure what was leather. The strap isnt adjustable, so if you have large ankles these may not work for you. I DO wish that there wasn?t a label right on the bottom of the insole. But I really love it! It charges in the Qi charger easily. Compared to the Shure SE215, I personally prefer the sound of the IE 40 Pros. Bar doesnt seem to care. No dejan de ser auriculares de plástico, y si bien se les ve muy sólidos y resistentes, no como otros que parece que se van a desmontar, un pisotón y adiós muy buenas.