Powered by H20 technology designed to withstand heavy perspiration, the Momentum Ultra-Light Headphones can be used in all types of weather and be rinsed after use for a fresh, clean fit. Momentum includes 4 ear tip sizes to provide a customizable fit that keeps headphones in place during even the most rigorous of activities, making it ideal for all atheletes. A retro-reflective, tangle free cord illuminates with light for extra visibility and safety while working out or running in low light. The in-line remote is iPod and iPhone compatible, allowing control of volume and playback, as well as placing or receiving calls and activating SIRI.