Smaller size, bigger sound. At 20% smaller than any other headphone in the Shokz line, the OpenRun Pro are forgettably comfortable. Bone conduction technology lets you hear your music and your world. The streamlined design makes room for dual bass enhancers, so you can feel your workout playlist. The OpenRun design has proven itself, with users loving its comfort and stability when on the move. Carefully aimed transducers provide improved sound quality, with natural sounding highs and impactful bass. The right track can get you closer to your next PR, but it is not always safe to hear only your tunes. That is where bone conduction headphones come in, sound vibrations are sent directly to your inner ear, leaving your ear canal clear to take in the world around you.