Koss PATHFINDRB Lightweight Earbud Stereophone with In-line Volume Control - (BLACK) Dynamic element positioned outside of ear connects to tubular port structure Slow memory ear cushion made of formed urethane, for a custom fit Soft Foam ear cushion enhance deep base and treble clarity Enhanced isolation decreases ambient noise Covered by the Koss Stereo phone Limited Lifetime Warranty Connectivity Technology : Wired