Frame Color: Matte Black Frame Material: Acetate Temple Material: Acetate with 925 Silver Hinges, Branding and Temple Tips Size: 58-17-135 Model No:  Made in Japan Nylon Category 3 Dark Tint Lenses - Grey GraduatedNylon 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.