Re-engineered from the inside out, Bose IE2 audio headphones let you experience musical detail and a comfortable in-ear fit that conventional earbuds cannot match. An enhanced acoustic design helps your music sound smoother and more natural. Bose IE2 headphones are also constructed for lasting quality and tested to meet rigorous standards for durability. And whether you exercise, enjoy active sports or just listen on the go, proprietary StayHear(TM) tips rest comfortably and securely in your ears. Original-style tips are also included for your choice of fit. Both come in three sizes for a personalized fit. The included carrying case protects the headphones during transport. Experience Bose IE2 headphones for yourself, and discover why they look, feel and sound like no other headphones you've tried before.