Headphones that work as hard as you do, featuring an open-ear design, lightweight comfort, and dynamic sound range for training and life on-the-go. Bluetooth 4.2. IP55 Water Resistant. 6-Hour Battery Life. Lightweight + Comfortable. No wires. No bulk. No limits. Bone conduction technology leaves ears bud-free and open to ambient sound, while the lightweight and flexible design allows for all-day listening. Inspired by athletes, Air repels sweat, dust, and moisture to help you push your limits.