The Bose QuietComfort 15 headphones feature exclusive Bose advancements in noise reduction technology. You hear less noise than ever before, and even more of your music and movies. With the quality sound you expect from Bose. Its lightweight fit will stay comfortable for hours. It's a combination of benefits unmatched in the industry. Significantly improved noise reduction across a wider range of frequencies. Thanks to proprietary Bose innovations, now microphones are used both inside and outside each ear cup to sense and reduce more of the sounds around you. Redesigned ear cushions use new materials in a proprietary design to establish a critical acoustical sealhelping to further reduce noise while providing the headphone user with a comfortable fit.