SUUNTO SONIC RED LIGHTWEIGHT BONE CONDUCTION HEADPHONESFOR ALL SPORTS Experience the freedom of movement and sound with Suunto Sonic bone conduction headphones, your ideal training partner for the outdoors. By using bone conduction technology, these headphones rest securely on your cheekbones rather than inside your ears, delivering high quality sound while keeping your ear canals open. Open ear design allows you to stay alert to your environment while enjoying audio through bone conduction High fidelity