Optic Nerve Ranch Interchangeable Lens sunglasses. Active lens venting, adjustable temples, includes hard case. All Interchangeables come with a hard case except Caption All Interchangeables are Nonslip construction All Interchangeable glasses have Active Lens venting Except Caption Interchangeable lenses SmokeMirror Bright sun conditions, 18 light transmission RoseCopper General to variable conditions, 26 light tra
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