Oakley Half Jacket - Jet Black Iridium Oakley's first dual-lens eyewear with interchangeable lenses. This chameleon lets you adapt instantly to any light condition. When the sun fades or flares, switch to a new set of optional lenses and change your entire point of view. Accented with true metal icons, the lightweight O Matter frame includes Unobtainium earsocks and grip anchors. The open-edge design extends your vertical field of vision, and each set of optional lenses retains the peripheral clarity of XYZ Optics. Iridium Coating Iridium lens coatings allow you to tune transmission for any light condition. Metallic oxides are superheated to 1500 deg Celsius and fused to the lens at the molecular level, permanently bonding to create a uniform filtering layer that optimizes contrast and minimizes glare. The semi-reflective coatings are specifically formulated for precise balance between reflection, transmission and absorption, depending on the targeted environment for usage.