BESI SUN Sunglasses by Gotti. Color: Ash, Slate, Mocca, Sand, Teal, Blush, Size: 52-17, Material: 3D Bionic, Collection: Götti Dimension Bionic .. The Gotti Besi Sun brings a refined round silhouette to your everyday lineup – light on the face, polished in any setting, and thoughtfully balanced for day-long comfort. The frame's sustainable bio-based castor-polyamide construction is tough, lightweight, and built for daily use without fuss. High-grade sun lenses provide reliable UV protection. Made in Switzerland.