Completely sealed with a ceramic polymer that binds at the molecular level, its ultra-lightweight magnesium alloy is the metal of fighter jets. A low-profile nosepiece and plush Unobtainium® earsocks maintain a secure grip. The adaptable fit is achieved with custom-engineered spring hinges and molded cam lobes that offer the comfort of progressive earstem tension. Optical clarity is wrapped and raked into a wide panorama of POLARIC ELLIPSOID™ lens geometry. Lens venting creates low-pressure zones for cooling airflow, and the three optional lens shapes are instantly interchangeable. All Oakley eyewear is warranted for one year from the date of purchase against manufacturer defects.