Model: Brushed Silver tone Square Aviator Frame colour: White Gold and Silver Tone Frame Material: Titanium Temple Material: Titanium and Black Acetate Temple Ends with 925 Silver Temple Tips Size: 53-15-140 Model No: AD12C1SUN Made in Japan Nylon Category 2 Medium Tint Lenses - Grey Nylon is a newer top-notch performance material, it combines the advantages of polycarbonate 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.