Stax Eyeglasses by Barton Perreira. Shape: Rectangle, Material: Acetate, Color: Absinthe, Black, Blue Smoke, Chestnut, Crystal, Matte Heroine Chic, Matte Midnight, Oxblood, Raven Tortoise Gradient, Stonehenge, Size: 50-21-148. Meticulously crafted by hand in Japan, a single pair of Barton Perreira frames is a real work-of-art with exquisite details and stunning silhouettes. Every facet and every angle of Barton Perreira glasses is brought to life with virtuosity and precision. Made from the premium-grade Japanese acetate and titanium, they fit like a tailored suit. In addition, the frames are wired with an adjustable foundation to align perfectly with the wearers face, while maintaining its shape.