One of Oakley's most popular styles, Oakley Turbine Sunglasses are designed for an active lifestyle. Clean lines, large rectangular lenses, and inset zones of sure-grip Unobtainium, makes these sunglasses stylish and comfortable. To ensure a perfect fit and optical alignment, these shades feature Oakley's Three-Point Fit System. Features of Oakley Turbine Sunglasses Oakley Twin Toric lens technology with HDO Polarized and Iridium™ lens options available Unobtainium earsocks and nosepads for increased comfort and performance Interchangeable accessory metal icon accents Available with PRIZM lenses to enhance color, contrast and detail for an optimized experience Oakley SI Turbine Matte Black w/PRIZM Grey Lenses OO9263-4663