ONE MORE UPDATE #2:  After glueing the rubber strips down for the third time last night, when I got up this morning and picked up my buds to use them, the rubber stripping was popped up again on one side. That was discouraging, but I might have been able to live with it, except that it would expose the inside wiring to all kinds of environmental debris and eventually shorten the life of the earbuds. The thing that finally made me decide to return them (with a heavy heart) was that the sound quality had deteriorated noticeably in the right earbud when I was doing my (low impact) workout this morning. It was crackling and popping and fading in and out, which it had never done before. I don't know if this is due to me trying to glue down the rubber stripping (I used the blunt end of a sewing needle to apply the glue, so it was a precision glue job, I'll tell you!), or if the headset itself was just falling apart, but that was the last straw. It's obvious that there is either an engineering, manufacturing, or quality problem with this product. So I would caution would-be buyers to consider this carefully before investing your money in these earbuds. Amazon was very good about sending me a return label, so they're packed up and ready to go to UPS tomorrow, but what a sad experience. I really thought I had found the perfect Bluetooth headphones!!! Let the buyer beware - it may have been that I just got a bad pair, but I read at least one other review that mentioned this very same problem with the rubber stripping underneath the "collar", so I know I was not the only one. That's really bad, that these earbuds went from five stars two days ago to one star today.