I bought these after a friend recommended the to me and I gave them a short try. First I was really happy with them as they sounded pretty good, bass was great, although it has some trouble with highs and mids aren't clear all the times (it was made for everyday bassheads after all). A great plus was that it was fairly easy to get free (limited edition) headbands for it through the soldierofsound website. But then problems started...
 
Noise cancellation is good, I had no issue using it on public transportation. Due to the headphone's simple and swappable design it's fairly big and it might look like you wear the heads of toilette pumps on your ears. The cushion on the headband and the cans are really soft and comfortable but the headband itself can be pretty tight if you have a big head. Headbands are durable, as the company states indestructible, and come in an endless variation of colors and designs. The cord seems to be a little bit cheap and it feels like its easy to tear them (especially after it splits into two lines). Remote is pretty ****ty, the fake metallic surface got scratched in the first few days, mic quality is okay.
 
The headphones lasted half a year. I started to notice that the left can sometimes distorts bass and that it makes a weird clicking noise every time I move my head. I wrote customer support on the 18th of December, I was told that my replacement cans will be shipped immediately - they haven't arrived yet because of stock shortages...

This is another well-built set of stylish earphones from Sennheiser. As they are not in-ears, noise canceling is not too good. Sound quality is still great though.
The earphones have a little wheel-looking part on them which make it harder for them to fall out from your ear (and make it look pretty weird). The heads of these can be swapped for S/M/L sizes and there are other accessories for finding the right fit for everyone.
The volume control is pretty awkward, you have to slide an aluminum "houseing" up and down a plastic stick, there's no remote.

This really is a great set of in-ear sport earphones. The noise cancelation is really good, I used it while biking and on public transportation too - had no issue with outside noise. The build quality could be a little bit better, but the lightweight plastic construction is needed so they are lightweight. The fake kevlar-looking insert on them fells off pretty soon (I had two sets of these earphones, that plastic piece lasted a year each time) In my opinion the symmetrical cord wasn't the best choice as an asymmetrical one would be a lot more comfortable and would offer a better fit and not getting tangled while running.
 
As it was mentioned before me, the comfort is great, the fins keep the earphones in your ears and I don't think sweat could be an issue for anyone. Sound quality is good, detailed mids, bass is good.
Came with a carrying pouch and a set of S/M/L sized fins, no-fin rubber parts, sponges for the canal (to soak up sweat), a tool for swapping the sponge and buds.

The build quality of these earphones are perfect: from the very first time you hold a pair of these in your hands you know that they won't fall apart any time soon. But this build quality leads to some issues: the housing is pretty heavy and this can make the use of these clip-on styled headphones pretty uncomfortable for some people. Noise canceling isn't really good but keep in mind that this isn't an in-ear earphone.
 
The product came with a set of accessories and a shell-shaped hard plastic carrying case.