Propulse is a model specifically designed for running: thanks to its ultra-light, oval geometry, Propulse provides a perfect and natural fit without annoying pressure on the head. The end result is an extremely comfortable and stable pair of glasses with proprietary integrated Hi-Grip temple tips, and massive ventilation holes on the front of the frame, lenses, and temples to effectively prevent fogging. The wide lenses provide better eye protection, minimizing the risk of tearing, while ensuring a deep field of vision.