Specifically designed with bass lines in mind, MDR-XB41EX earbuds serve up amazing sound quality with an extra large helping of bass you can bump to. Innovative, newly developed stay-in design makes for a more secure fit. Choose between four sizes of noise cancelling earbuds or three sizes of lightweight hybrid silicone earbuds. With seven included earbuds overall, one is sure to be the perfect fit. In addition to a snug fit, selecting one of the supplied noise isolating earbuds increases attenuation of ambient noise, so you'll hear more of your music, and less of the noise around you. Enjoy the flat 1.2m cord designed to discourage tangles, as well as the convenient carrying case great for stowing your extra bass earbuds away between uses.