General Information
Sony's MDR-EX55 Ear-Bud Headphones use a silicon Ear-Bud that allows the driver to fit comfortably in the ear canal and prevents it from slipping out too easily. It also helps to block surrounding noise by helping to seal the ear canal from that noise. The EX55 also comes with 3 different sizes of Ear-Buds allowing them to fit comfortably in a large range of ear sizes.
