15mm speaker driver optimizes wearing comfort Bass beat vents allow air movement for better sound Neodymium magnets enhance bass performance and sensitivity Slim cap earbud design for best comfort fit15mm speaker driver optimizes wearing comfort Small enough for optimum wearing comfort and big enough to deliver crisp, non-distorted sound, the 15mm speaker driver is an ideal size for listening enjoyment. Slim cap earbud design for best comfort fit Slim cap is ergonomically designed according to the anatomy of the human ear canal. It fits in the ear securely and comfortable for earbud lovers. Bass beat vents allow air movement for better sound Bass beat vents allow air movement for better sound with a deep rich bass. Super soft rubber caps for sensational comfort The ultra soft rubber material on the rubber caps are sensational to the touch and adapts effortlessly to your ear. In-ear headphones have never been this comfortable.