The Bagis is a compact version of the full Urbanears experience. It"s an earplug construction for a direct sound and efficient noise reduction. It features rubber housing along with a combined fabric and TPE cord to eliminate distortions caused by friction. As a bonus each earpiece snaps together, allowing you to carry them around your neck when not in use. So now you know where they"re at. 9 mm handmade drivers Frequency Response - 20Hz-20kHz Impedance - 16O Sensitivity - 107dB Max Input Power - 5mW