I got these a week ago and I am glad I did. They fit great and I have tried to get them of by violently shaking my head and still not been able to. This is very important if you like to take your music along for your activities. The music quality is also superb for the price. I feel the secure fit helps with consistent music being pumped. The last activity based headphones I had would become loose around my ears and the music would keep waning out in terms of volume. The pair being water resistant surely helps. Once I went straight into the shower without realising I was still wearing them and no issues. Great headphones if you are seeking them for music during activities.

I bought these a couple of years ago and I've used them in many situations: running, basketball, gym and they've always been comfortable, battery is not amazing but enough for the length of my sessions, sound is decent when the seal is good. However, I'm giving it a 2 star review because now, after only 2 years of use, the headset has completely broken apart: the rubber covering the whole thing first cracked on the right side ear hook making it impossible to wear, I put some tape on it and could wear it for a few weeks longer, but then the other side broke too, exposing the magnet inside, at this point the headset is beyond saving, don't buy these if you're looking for a durable product as it's a common problem (do a quick search and you'll find many cases of the same)

I wanted them to work, but they don't. At least not for lap swimming. Yes, I put them into MP3 mode BEFORE entering the pool. Even with them in MP3 mode, they would switch to bluetooth or pause the song every time I turned my head to take a breath on the right side. The difference in pressure between the water and the air when breathing was enough for the device to think I was touching it and switch modes or pause the song. If you're a snorkel swimmer it might work perfect, since your ears stay at the same level the whole time. Sound was great underwater, loading music is easy, the contols are just to sensitive. If there is a different way to LOCK them besides entering into MP3 mode, the manual doesn't list it.