To say that there are many sets with blue teeth would be an understatement. Going through them all to find the one that fits the criteria you need in a sports headset only makes the search harder. It's easy to find ones that sound good and are comfortable for everyday wear, but the list narrows when it comes to enduring heavy sweats and jerky movements during a tough workout. I wasn't sure at first when I got them because the sound wasn't as good as my home headset. Before I thought about returning it, I wanted to at least test it. Let me just say that they are built to withstand the tough workouts and sweat that come with it. It's been a few months and so far they've held up great and the sound is actually pretty good considering the training environment is very different from the home environment where sound quality is more critical. I chose these because I don't like in-ear headphones and prefer a round fit. The only thing I can recommend is to take the time to adjust them properly before you start exercising. As long as they sit snugly on the ears, they will stay in place during exercise. After use, you really don't have to do anything other than quickly wipe them off and put them in your pocket. I'll see how they hold up in the long run, but so far so good.
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