I have bought several of these headphones and they all had the same problem, ie one or both earphones stopped working. This is clearly a cable issue because if you tamper with the cable where it connects to the jack, the sound momentarily returns to the earbud. Sound quality is satisfactory (it doesn't have to be excellent for swimming). The fit in the ear canal is tight and does not let water through. I highly recommend using products like fitGoo or Vaseline for both lubrication and waterproofing. I use them for open water swimming in a lake so I don't know how well they work with somersaults. Given the number of other reviews reporting the same issue of sound loss due to wires in one or both ears, I suggest you look for another brand. Surprised that the manufacturer did not pay attention to the reviews and did not update the wire, even if he had to raise the price a little. I just bought the Swimbuds Flip and I hope they work better and last longer. Will report from those who have used it for a while.
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