Sennheiser IE 900 High Fidelity Earphones (Open Box) headphone lightning The exterior breathable material is

The exterior breathable material is soft

If you want to customize your touch controls

For certain situations

which is the same response heard at the eardrum in a typical ear

Driver Diameter 53mm Frequency Response 8 to 29

Sennheiser IE 900 High Fidelity Earphones (Open Box) headphone lightning The exterior breathable material isIE 900 The precision manufactured aluminum housing of the IE 900 faithfully protects the dynamic TrueResponse transducers at the heart of Sennheisers innovative X3R technology. Experience the peak of German audio engineering and manufacturing with earphones that deliver only the purest, most natural sound. Features New benchmark in portable audio Ultimate precision & craftsmanship Developed in Germany and manufactured at our state of the art Ireland