Experience pristine audio quality with the MDR-EX300 earbud style headphones. Offering crisp audio to the perceptive ear, these high-quality earbuds allow a recognizable separation among musical instruments. The key technology is the closed-type, vertical in-the-ear 13.5mm driver unit, which allows for a larger driver with substantial sound while maintaining a comfortable and secure in-ear fit over a long period of time. The hybrid silicone earbuds consist of two kinds of silicone to help block noise by creating a close seal with the ear. Three sizes of ear cushions and a handy carrying case are also included.