Frame Colour: White Frame Material: Acetate Temple Material: Acetate with 925 Silver Hinges, Temple Tips and Branding Size: 60-14-135 Model No: AD37C4SUN Made in Japan Nylon Category 2 Medium Tint Lenses - Solid Grey 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.