The SE112 with Dynamic MicroDriver provides premium great sound and build quality and represents a significant upgrade from the standard "earbuds" supplied with today's portable digital devices. SOUND ISOLATING DESIGN Comfortable sound isolating sleeves block up to 37 dB of ambient noise. Sound isolating technology prevents outside noise from interfering with your listening experience, whether onstage or on-the-go. Shure Sound Isolating Earphones require a proper fit to achieve the best sound. UNMATCHED PERSONALIZATION AND COMFORT Ergonomic, professional design to rest comfortably in the ear. Over-the-ear configuration keeps cables out of the way. Fit Kit includes three sizes of soft, flexible sleeves which gently contour to your ears for a perfect fit. Drawstring pouch also included for storage.