Experience the innovative combination of the best noise reduction technology and the best headphone audio performance with the QuietComfort 2 Acoustic Noise Cancelling headphones. The premium headphones dramatically reduce unwanted noise, and advances in Bose technology make what you want to hear sound even better. Their ergonomic design allows for a comfortable fit and the fold-flat feature makes storage of these lightweight headphones even easier.Slip on a pair of QuietComfort 2 headphones and hear your music come alive. Decades of Bose research combine with the Acoustic Noise Cancelling headphone technology to deliver the ultimate in audio performance. This award-winning technology electronically identifies and reduces the unwanted noise around you. So you hear more of what you want to hear? and less of the tiresome sounds that have so often distracted you.Proprietary TriPort headphone technology also helps give you the best headphone audio performance while keeping the design compact and streamlined. Unlike conventional, bulky noise reduction headphones, QuietComfort 2 headphones are lightweight and comfortable. Listening to your favorite music, you may even forget you have them on.Whether you take them on a trip or to the office, your QuietComfort 2 headphones will fold flat to store easily in a bag or briefcase. A single detachable audio cable gives you easy access to portable players, home stereos and in-flight entertainment systems, all with less tangling than two-cable designs. That same cable can be removed so your headphones can go "cordless" when you simply want the benefits of noise reduction.