Featuring premium sound and build quality, Shure Dynamic MicroDriver sound-isolating earphones are a significant upgrade from the standard earbuds that came with your personal digital device. Because they're evolved from the personal monitor technology that's used by professional stage musicians, you'll experience pristine, detailed highs and rich, deep bass every time you wear Dynamic MicroDrivers. Sound isolation technology blocks ambient noise up to 37dB, preventing it from interfering with your listening experience whether you're on a stage or on a subway. Also, Dynamic MicroDrivers' sound-isolating sleeves are available in multiple sizes in order to ensure a secure, comfortable fit. Music is a lifestyle here at Guitarlicious. Like you, we listen to music when we're on the go, and Shure Dynamic MicroDriver sound-isolating earphones optimize the experience!