Daicel Acetate (Japan), Higher quality and stability, excellent in heat resistance, stable against sunlight. Environmentally friendly resin made from cellulose obtained from wood and cotton. Titanium insert around the lenses. Stainless steel hinges made in Germany, sharp angles design, Japanese high definition, high contrast lenses with oilophobic treatment and 8 layers antireflective coating. Stainless steel armed temples. Made in Japan.