Shut out the world and lose yourself in your music; or let the world in. Its your choice with the first in-ear noise cancelling headphones from Bose. The QuietComfort 20 Acoustic Noise Cancelling headphones let you enjoy better sound every day, everywhere you go. Turn on noise cancelling to reduce surrounding distractions and focus on your music. Or, at the touch of a button, activate Aware mode to hear whats happening around you.