The fantastic Bose Quiet Comfort headphones have been re-engineered to deliver the same amazing sound quality as before, but for the first time being wireless. By using Active Noise Cancellation, anything you listen to sounds that much better as you have no background noise interfering with the music. Using microphones inside & outside of the earcup, the Bose Quiet Comfort 35 headphones send the reverse sound to cancel out the noise. Even if you just want silence these are fantastic! A solid battery life is important & the Quiet Comfort 35's can deliver up to 20 hours wirelessly, or should you use a cable you can get up to 40 hours of use. The headband has been wrapped in luxurious Alcantara which allows a longer wear time thanks to its extreme comfort, the ear cushions are manufactured from a synthetic leather & contain a silicone bead for some passive noise reduction.