It takes 200 tons of force and high-energy microplasmic oxidation to render eyewear with ultra-lightweight magnesium alloy. Changeable nosebombs & earsocks of Unobtainium® improve grip with perspiration, and the custom-engineered spring hinges include sculptural cam lobes for the comfort of progressive earstem tension. XYZ Optics® offers startling definition at all angles of view, even at the lens periphery. Choose the full-size Mag Four or the reduced cranial geometry of Mag Four S for smaller faces.