End result,,,,,if given the opportunity I would not have purchase these. it play the noise. They are nice sandals I had no idea two nearly identical lines from Nike could have such major quality differences. Disappointing from a "name" brand. I was a little leery since it wasn?t a brand name and it wasn?t too expensive? but this thing is great! Its a good value for your money but these things shriek. I work an office job though so that may be overkill, but it makes me happy. The outer bracket slides then is tightened by a bolt with a knob handle. The replacement came (black again) and this time one of the ear pieces was detached from the headband.