Great headphones for exercise.
356822
Great set of headphones! They fit really well in my ears, and the hook over the ear feels more solid and secure than other over ear headphones I've tried. The connection is smooth while running, and the noise cancellation is solid as well.
4689439
Great product for active lifestyle. I would highly recommend to anyone wanting a solid set of headphones for the gym or running.
82665
For the price these are really great headphones. I only use them for going out, as I have access to speakers and open backed headphones which both sound better, but these are great for the purpose. If you like listening to music while you workout, I recommend these, although not for running (they fill with sweat real fast, and fall out a lot), and be careful with the chord. I don't even do that anymore, but I keep them around for hiking.
2218236
Awesome. I tired of my old pair of earbuds falling out during a workout and can say these are a big improvement. The sound is great. Would highly recommend to anyone who listens to music while working out.
253262
I absolutely love these headphones. These headphones sound great and have no connectivity issues. They are also comfortable and hard to slip off from your head during physical activities. These headphones are great for working out, or if you just want to chill and listen to music; these headphones don't disappoint.
1477099
I have tried various over-the-ear headphones, and these are the best.  I use them mostly for jogging and mountain biking, so if that's what you want, get these.  The sound quality isn't awesome - again, good enough for exercise where you don't need the best sound quality.

For comfort during exercise, I think these are the best.  Every other headphones I tried were much harder to get on your ear.  You can put the Nike Vapor headphones on without even looking in a mirror.  And some other headphones would physically hurt my ears due to the shape and bulk.  The Nike headphones are light and don't have much material to them at all - very light.  They can get loose during exercise, but not as often as other models, and they are so easy to just put back on.

They are also great for cold weather exercise if you put on a wool hat to jog, or a skull cap for biking.  Other models I tried would ALWAYS come loose or hurt my ears under a hat or skull cap, and then refer to my comment that other models are a pain in the butt to get on your ear without a mirror.  The Nike headphones rarely come loose under a hat (because they are so small and light), and I even usually wear glasses.  And they don't hurt my ears under a hat.  Can't tell they are there.

For exercise - get 'em.  The best.

I'm actually sitting here yanking on them and they aren't coming loose.  Pretty cool.  These are a new pair though.  I have been through a few pairs, maybe one pair every 6-12 months.  No headphones will last much longer when used for exercise though.
3484710
I love these headphones for working out.  They stay on and the sound quality is amazing.  I love this product.
2556551
So far I have used these headphones 4 times at the gym. The fit snuggly and do not move while I am exercising on the elliptical and lifting weights.
4436871
Really good headphones that fit well in my ear. Great for working out in. The sound quality is good as well.
1843518
These headphones do what I wanted.  Sound good for music at the gym.  Stays on during active workouts.  My only complaint is that it is not snug against the ears to block out unwanted noise.
2033571
These are my favorite headphones for working out and running.  They stay in place.  Easy to clean and great sound.
4303186
liek the headphones. Definitely recommend the headphones for exercise. The plugs to hold the earphones are not the best though
705509
I love these headphones! They stay in my ears while I workout and have a quality sound. The range is also pretty good.
4086761
Great sound quality, they fit nicely into my ears and are not falling out during exercise. Easy to set up as well. Very pleased with this purchase.
2442457
So far, these headphones have performed exceptionally well.  I mainly use them when working out, once you get used to tucking them behind your ears, they are very easy to use and mostly stable.  Definitely beats having the cord get all tangled up while my phone is in my pocket.  The only minor issue is that during a sweaty 90-minute workout they can sometimes slip off your ears if you are on a decline bench or something.  I liked these so much I bought a pair for my wife.
814657
These headphones sound great and are good for the gym. I've been using the same pair for months.
918462
So far I really like these.... Would definitely recommend them to anyone that needs to listen to good music while they are working out.