Weighing just 26g, the Shokz Openrun (previously Aftershokz Aeropex) offer revolutionary open-ear listening. With nothing inside or over your ears, patented bone conduction technology allows for total situational awareness and comfort while you listen. Re-engineered technology delivers the widest dynamic stereo sound that bone conduction can offer. Say hello to deeper bass, less vibration and louder volume. They are also fully sweat and water resistant, meaning that they are ready for intense workouts and extreme weather, and the wraparound Titanium frame ensures a secure fit that will stay in place during any workout or adventure. Finally, you shouldn't get held back by your headphones. With 6 hours of battery life and a 10-day standby time, enjoy music, calls, audiobooks, and podcasts all day long. Please note, the Shokz Openrun were recently renamed; previously known as the Aftershokz Aeropex. When ordering online, the packing you recieve may be branded with either name but the product within remians identical.