Propulse is the model specifically designed for running: thanks to its ultralight wraparound geometry, the Propulse offers a perfect and natural compression fit without any annoying pressure on the head.The end result is an extremely comfortable and stable goggle with its patented Hi-Grip integrated temple tips, massive vents on the front chassis, lenses and temples to efficiently avoid fogging.The wide lenses offer improved eye protection that minimizes the risk of tearing and offers a deep field of vision.