I second this: The DT770 are very comfortable to wear, and being of "closed" design both isolate yourself from the environment and prevent your sound leaking ou

I second this: The DT770 are very comfortable to wear, and being of "closed" design both isolate yourself from the environment and prevent your sound leaking out annoying your coworkers. Currently they are my favourite headphones! Strongly recommended, sound quality is excellent. If you want a little less isolation, the AKG K240 MKii are a good choice, but your coworkers might complain that sound leaks out (semi-open design). Their padding is fake-leather (but you can get fuzzy replacement pads) that tends to get sweaty after longer use. Sound quality is also very good.