The Koss plug revolutionized the world of in-ear headphones. A first of its kind, these are stereo, noise-isolating in-ear headphones that deliver the kind of accurate acoustical reproduction and isolation typically found only in high-end, closed-style high fidelity headphones. The soft foam cushion expands for a custom comfort fit with every listening experience. This also improves isolation, blocking out ambient sounds and enhances deep bass and treble clarity.
