This was an upgrade to the inexpensive headphones I was using at the gym, which were uncomfortable and didn't reduce background noise

An added bonus, they do a great job of eliminating background noise of the office to really help my concentrate.

These are very comfortable, reduce background noise and are great for listening to audio books while working out

Can use at lower volumes because they block out background noise.

These are very nice headphones for the price, but they don't do a great job blocking background noise if you're on an airplane.

The background noise is cut so it is not at all intrusive, yet I can hear enough to respond should someone wish to get my attention

Best wired headphones you can buy, very little, if any, background noise.

598 Cs Closed Back Headphones that somehow got lost on a recent trip, and the Sennheiser's do a MUCH better job at blocking out background noise.

Just as great as always

Really flimsy as I can't get it back on

I use these in the studio as well as for the TV late at night

These have a tinny sound to them, as well as when listening with them, i hear what sounds like an old 33 1/3 record scraping sound through them.

Perfect!I like the neutral sound

great i now have them again