A lot of adapters for this provide great isolation.  The bendy wire attached to the ear bud makes it hold tight to your ears.  The clip is pretty useless, and the pouch is really small.The sound is decent.  Not great.  It's a little tinny and lacks any real base, but everything is audible and there isn't a lot of noticeable distortion.I purchased these to replace a pair of Shure isolating ear buds.  Let's be real.  They are a cheap replacement.  The audio quality is no where near the Shure set.  They do well at work and the gym but I won't brag about them.  Nor will I harp on the audio.  Also, when I put this set through the dryer, I wont be so angry with myself.If you want the best audio out there, ridiculous comfort and amazing isolation, pay more and get more.  If you want to spend a few bucks so you don't have to hear grotesque noises from the cubicle next to you or the person on the next treadmill, these will do the trick.I'd recommend them. 

Question: How is it the fit?
Answer: provide great isolation