Frame Colour: Tortoise Shell Frame Material: Acetate Temple Material: Acetate with 925 Silver Hinge, Branding and Temple tips Size: 60-14-135 Model No: AD37C2SUN Made in Japan Nylon Category 3 Dark Tint Lenses - Brown Nylon is a newer top-notch performance material, it combines the advantages of poly-carbonate and CR-39 lenses. Nylon lenses have an outstanding shock resistance while being extremely lightweight and do not crack when drilled, making them perfect for some frame shapes. This is an exclusive collaboration with Linda Farrow that produced the Sunglasses to their highest standards.