The Ermenegildo Zegna 5169 optical frames feature a soft square lens shape and keyhole bridge design for men. The frame is constructed of Acetate and features herringbone patterned stud details and a transparent inner layer at the temples that reveal the inner metal support. No detail of Zegna's designs are a result of chance or coincidence. Please note these eyeglasses are provided with Demo Lenses in order to demonstrate the final appearance of your frames. Please visit your local Optometrist or Optician to replace with optical quality lenses.