Open-Ear Design for All-Day Comfort: Rest gently on your ears without sitting inside the canal, to reduce pressure and ensure comfort for all-day listening while keeping you aware of your surroundings. Flexible, Secure Fit: With a flexible, memory titanium core and soft polymer exterior, C50i adapt to different ear shapes, and naturally follow the contour of your ear, for a fit that's as secure as it is comfortable. Powerful Bass, Louder Sound: Custom 12-millimetre custom drivers deliver deep, vibrant bass, and sound up to 86 dB output so you always enjoy clear and immersive audio. Crisp, Clear Calls: Microphones and advanced AI work together to filter out external noise and wind for crystal-clear calls. Be heard loud and clear no matter where you are, for conversations that sound like they're face-to-face.