Polymer driver offers frequency response up to 100kHz. Aluminum liquid crystal polymer film driver. Oxygen-free audio cable ensures minimal signal transmission loss. Pressure-relieving cushions for extended comfort. Beat Response Control for improved bass and transient response. Enfolding structure for wrap-around feel and improved acoustic seal. Inward axis structure delivers optimum fit. In-line remote and microphone for hands-free phone calling. Carrying pouch.