SENNHEISER PX-10 Ultra-lightweight In-ear Headphones

 Great sound! Loose headband, no sound isolation
The sound on these headphones has a bit more high frequency and bass boost than typical Senheiser headphones. However, unlike many headphones with this sort of a boost, the midrange still comes through with a clarity that is classic Sennheiser. The overall effect will probably be quite pleasing to people who think that Sennheiser headphones lack enough bass.

There is also a volume control device on the cord which is identical to what's on the Sennheiser MX-500 earbuds. I don't make use of this thing since the cord is only about 3 ft. long and any device you hook it up to is going to have a much better volume control button, but some people might like this.

These headphones are almost like earbuds, except that the way they fit into your ear keeps the ear canal open so that outside sounds and noises still get in. This has its pluses and minuses of course. If you need to hear what's going on around you for safety or work reasons, that's a plus, I suppose.

The headband is EXTREMELY light and loose. The plus is that I guess you will not feel any pressure at all on your head or ears from the headband, but the minus is that they do not have enough tension on them to pop the speakers into position in your ear by themselves. You will have to push the speakers in and hope that your ear anatomy will fit these rather large buds and that the fit will have enough friction to hold them in place. If they fit, then they sound great. If for some reason you can't get them to seat properly, these headphones will sound either tinny (too far away) or muffled (pressed too close in). The amount of bass you get will also vary with how well seated you can get the speakers into your ear.

So I'm fairly certain that some people will write in panning these headphones for the simple reason that they don't fit and so don't sound very good. But they do fit me just fine, with a little jiggling, and sound great.

I also have the Sony MDR-A44L, which look similar. The headband on the Sony is slightly tighter and is just about perfect for holding the earphones in place without causing discomfort. The Sony has even more bass, but the midrange lacks the clarity of these Sennheisers.

Overall, despite the loose headband, I prefer these Sennheisers to the Sony, but I should note that I have used Sennheiser headphones for years and prefer their sound. It's just whatever you are used to hearing.