Bose IE2 audio headphones set a new standard for sound reproduction that conventional earbuds can't match. Re-engineered from the inside out, they feature an enhanced acoustic design that helps music sound smoother and more natural. And our new construction provides a more secure fit and improved durability. IE2 headphones reproduce music with more range and realism than most typical earbuds. A modified port design, in concert with our proprietary TriPort acoustic headphone structure, results in a richer audio performance, with more detail in music's high frequencies. More clarity, even at louder volume levels-an overall presence you'd expect from much larger headphones. Proprietary StayHear silicone tips offer greater in-ear stability during exercise and other active sports. Advanced materials and design allow the tips to nestle inside the bowl of the ear while also naturally conforming to the ear's upper ridge. The tips come in three sizes to fit listeners comfortably for hours on end. StayHear tips also are designed to remain more securely on the headphone itself. Overall, they provide a better on-the-go listening experience. IE2 headphones are sturdier than ever, thanks to advanced materials, construction and manufacturing techniques-all adding up to more lasting quality for you. Each pair undergoes rigorous testing to meet Bose standards for performance and durability. Bose IE2 headphones are engineered specifically for listening with MP3 players, laptops and portable CD players. The cable's angled plug fits directly into sources with recessed headphone jacks. Also included: a sleek, protective carrying case with room for a portable MP3 player, plus original-style tips in three sizes.