Great for noise cancelling
341378
Great for noise cancelling, but they made me nauseous, I believe from the pressure of the earphones around my ear/jaw area.  They also were a bit too big even at the smallest adjustment so they hung even lower.  I returned and got the quietcomfort earbuds instead and they are great.
2294055
I got these specifically because they allow you to hear noise around you. You can listen to music at a low volume with these in and still carry on a conversation.
1928315
These aren't really noise cancelling, but noise covering headphones.  The "noise cancellation" feature really just generates some white noise and boosts the volume a little.  They trick your ears into blocking out certain frequencies.  I doubt they work as well as Bose's $300 headphones, but for as cheap as they are, they're a steal.  I work in an office where people are addicted to speakerphones and turn their conversations up so that I can hear every word clearly.  I'm a computer programmer and it's a bit difficult to work with 4 different conversations blaring in my ears.  I used to have regular headphones and would turn them up to drown out the noise (bad for eardrums).  With these, I can turn music on a low volume and can't hear a thing!  The sound quality is not so good and they smell like new plastic for the first month, but they're cheap and cancel noise well.  Also, they're collapsable and come with a battery and a nice little carrying case so they won't get scratched when you're travelling.
4306687
ENJOYABLE HEADPHONES.  GREAT NOISE CANCELLING AND SOUND.
627679
They are the best things for shooting. It cancels out most of the noise, and is much better than trying to use the in-ear cancelling plugs. They are easily adjustable and are exactly what I was looking for.
12523
The earbuds are comfortable and don't make your ears hurt after a long flight. I can barely hear the hum of the airplane. These don't seem to block loud high pitched noises, but works perfectly well for most other noises. The noise cancelling does make music seem more transparent but still clearer than without the noise cancellation. One charge lasts pretty long, as I've only had to recharge after about a total of 5 flights, with some over 12 hours, after months of just sitting there.
262572
I ordered these for my son to wear at Monster Jam. They are adjustable so they fit him (3 years old) and my husband comfortably. They blocked out a majority of the noise and the price point was perfect considering we may or may not ever use them again. I've never bought or have even worn noise cancelling ear protection before so I don't have anything to compare them to, but I'm very happy with the purchase and would certainly order another pair if the need should arise.
589587
Love these.  I use these for gaming.  It silences outside noise as well due to it covering your ears and  tight sealing.
1385488
I was looking for some inexpensive noise-canceling headphones and these really fit the bill. They're not big and gawdy, and for the price, I can't imagine any other set of headphones providing better features. One thing that is slightly odd, is that the sound is MUCH better when the noise-canceling feature is turned on, essentially meaning that you will need to make sure you have a spare battery on hand if you're going to be using these as your main set of headphones.

I'm no audiophile by any means, but these work great for me, and I'm very happy with the purchase.
4472903
Not super-effective on the noise-cancelling thing, but better than not having noise-cancelling, and the sound is good (though not amazing) quality. Given the price, pretty terrific, really.
2975016
i haven't used the noise canceling yet but the blue mic is amazing..works well with what i use it for..i would but again or recomend
1040189
Finally, I found these. I purchased two other earmuffs that did not work as I wanted. These do. I wanted noise canceling for my woodshop. These work great for that. I also wanted Bluetooth capability to play music or radio while canceling the machinery noise. I tried two ther Bluetooth noise canceling headphones. Both of those were unsatisfactory. The noise canceling also cancelled out the music. Which defeats the purpose. These ProTech headphones do not have Bluetooth capability. But I was able to buy a Bluetooth receiver for the headphone jack. Together my problem is solved. With loud machinery, I hear only the music or radio at whatever lower level I want.
2283945
Device is great for canceling out noise too.  When I have it on at low volumes I can easily tune any outside noise.  Fits great and is a lot better sound quality then I expected from bluetooth headphones.  Recommend for anyone as I have wore them for hours with no problems.  Some people may not like the ear covers as they are large but personally I like them.
1846147
Got them for the office (open space with lots of people talking in the background). While the noise reduction is not perfect (not that I was expecting it to be perfect or anything close to that), it works great for noises like people walking close to you and general background noise. The noise reduction + a soft music track (classical/jazz works for me) will help me be focused in my computer a lot easier than with regular headphones.

Great construction, and the Comply Foam tips are just great.

At first I was reluctant on getting an in-ear headphones, but this so far are great. Really worth the money.
992482
I bought this product to replace my old JVC HANC250 noise-cancelling headphones, which fell apart after a few years of use.

The Audio Technicas are much better than the JVCs - The build quality is better, the sound is better, and the noise cancelling is *much* better.

While these headphones will not cancel 100% of ambient noise, they do a great job. In fact, I would not want them to cancel all ambient noise for safety and courtesy reasons.

They have great battery life. I'm still using the included battery after hours and hours of play.

The build quality seems to be good as well.

The only drawback is that they are large, and the carrying case is large.
256679
I got them to use with earphones but found they work on my bluetooth headset also. They are comfortable and help keep noise out. well worth it.
2379359
My husband uses these when he does store sets. Great for drowning out the noise, people yelling, industrial fans, forklifts etc... He can listen to his music, and still hear if he is getting a phone call.
My husband is very picky when it comes to things on, or in his ears. They have to be just right, or he gets annoyed and cant wear them for long. These are very comfy, don't over heat his ear like some others. Easy to charge, store and sync.
I must admit, I am all in favor of these when on a long haul too. We resonantly drove across country, unfortunately I became unwell. Thanks to these, my husband could still listen to his music, keeping him alert to drive while I slept. They are not totally noise canceling, which in my opinion is good, you can hear sirens if you need to. If played loud enough others can hear a little, but all in all, these are great.