SONY MDR-XB30EX-R Red | In-Ear EXTRA BASS Headphones (Japanese Import) Powerful Bass - specially designed, powerful drivers deliver deep, powerful bass (4-24 kHz) that perfectly complements todays popular music genres. Noise Attenuation - noise isolation earbuds not only provide an outstanding fit, but also utilize pressure relieving urethane foam to further reduce ambient noise. Direct Vibe Structure - A tightly sealed acoustic design allows for a high level of sound isolation which aides in the reproduction of powerful and extended bass sound. Flat Cord - the durable, 1.2 m flat cord has a serrated finish that reduces tangles, so you can get caught up in your music, not your cord. Secure Fit - hybrid silicone earbuds, allow for a tailored fit that further maximizes overall sound quality and comfort.