Now you can enjoy high-quality, comfortable in-ear headphones―engineered and developed by the most respected name in sound. Bose® in-ear headphones are the only earbud-style headphones that deliver the rich audio and comfortable design you've come to expect from Bose. These headphones incorporate proprietary TriPort® acoustic headphone structure for greater low-frequency output from a small headphone. This technology helps create more balanced, lifelike sound. You hear your music with more range, realism and clarity than commonly found with conventional earbuds. Removable small, medium and large ear tips are included, so you can adjust the size for a more accurate fit. The washable tips are color coded to make it easier to distinguish among them. Bose in-ear headphones are engineered specifically for portable audio devices like MP3 players, and CD and DVD players. They come with a small carrying case that protects the headphones when not in use. The sleek, black case also helps keep the cable organized and tangle free.