Philips SHE9850 In-Ear Headphones with Advanced Acoustics feature a high-definition transducer that produces an accurate audio reproduction. The 15-degree tilt acoustic design adjusts the angle of the speaker tube and ear bud to individual ear canal shapes. The earbud sleeves are made from slow recovery foam which is a comfortable alternative to rubber ear caps. Slow foam is compressed between the fingers before being inserted into your ear canal. After the earphone is held in place for a few seconds, the slow-recovery foam expands for a secure, tight fit and creates an excellent seal from ambient noise that enables you to listen to your music at a lower volume. These headphones are made with Philips iLab technology to ensure greater output from lower frequencies and help create a more balanced and crisp sound. The headphone body is made of soft flexi-grip material that protects the cable connection from damage that occurs from repeated bending of the headphone body. These headphones have a metal housing that shields them from unnecessary vibration for accurate sound transmission, resulting in smooth bass response and clear mid-to-high range tones. This package also includes a metal carrying case with a storage compartment for the foam sleeves and a cable bank which provides an easy solution for neat cable winding and headphone storage. The hard case exterior also provides additional protection for the headphones while not in use.