LINDBERG (Linberg) The classic frame of the era without frames. That was invented as the world's first Air Titanium (Air Titanium ) design is simple but maintains all functions. uniqueness Developed from generation to generation and continually inventing special techniques. Shapes, designs, colors, sizes to meet every need. This model weighs only 2.7 grams. Feel the difference in lightness. Matches every face and expresses your true self.