The DALI IO-6 have been tested by hifitrends.com.
"Their minimal weight (325g or about 11oz) along with the memory foam pads makes them very comfortable. I was able to wear them for hours on end while working, and I never felt any undue pressure on my head"
"The clarity of the IO-6 is the best I've ever heard in a noise-canceling headphone design. The tonality of instruments is so natural, the soundstage amazingly wide, and the imaging is mind-blowing."
"If you work from home, and you're looking for a good pair of wireless headphones with ANC, I would give these a try. (They will actually work great in the office as well!) They are comfortable enough to wear all day, shut out distracting noise in your environment, and they are one of the best sounding wireless headphones out there. The only issue you may have is forgetting about your work and losing yourself in the music."