It was coming loose from the side where the door slid past it. I do like the support that they give. Hubby absolutely loves them swearing theyre the best hes ever had. It comes with a swack of features, most of which I dont use. It does not fit for the JBL 600BTN. Very comfy, tho slightly tight. My only glitch, though very minor, is that my bicycle has disc brakes so has a cable running along the same area where this is to be installed. Besides that, pretty good sound, not the best by JBL. Exotic, economically depressed, volatile countries where smart Americans carry a satchel with a strategically placed Canadian patch sewed on. Waste of good IEMs not to use comply to get the best out of them.