So lightweight, youll think the name refers to gravity. Oakley re-engineered the Zero with a sleeker, more aerodynamic sculpt that maps better to cranial contours. Lens configuration includes larger Unobtainium earsocks to enhance comfort and grip. The low-profile nosepiece and open-edge lenses unlock your range of view. The application of High Definition Optics (HDO) allows the lens to maintain optical clarity when the world blasts by in a high-velocity blur.