Perfect for kayaking sailing fly-fishing and skiing Oakley's innovative dual-lens Polarized Half Jacket features interchangeable lenses that allow you to adapt to the intensity of changing light conditions while wearing the same frame. It features the same lightweight O Matter® frame as the Full Metal Jackets but with an open-edge design that helps extend your vertical field of vision. Unobtainium® earsocks and grip anchors keep the frame from sliding around on your face.