I had a pair of meiodng headphones since I was 16, unfortunately the vinyl had broken down in storage while I was trying to find an adapter. This also holds true during my visits to the gym. Whether I am using equipment or just walking/jogging the track, I can focus on my workout and not be distracted by the music issuing from their speakers or the ever-present dropping of weight equipment that can be jarring to say the least. .
I bought these a couple of years ago and I love them. In a flight the headphones worked quite efficiently allowing me to watch a movie without letting the engine noise annoy me too much or having the sound level high. While not perfect for just noise cancelation, by the time you add your favorite music, you are good to go. The sound is great and the headphones are comfortable. I thought they were somewhat pricey, but they have lasted my nightly use. I recommend them.
I have never had a pair of meidong headphones I didn't like. These are the best I've owned to date. meidong has never ever disappointed me period. meidong is the only brand I'll ever buy.