BESI Eyeglasses by Gotti. Color: Ash, Slate, Mocca, Sand, Teal, Blush, Size: 52-17, Material: 3D Bionic, Collection: Götti Dimension Bionic .. This Gotti Switzerland frame offers a sleek shape that suits professional settings as comfortably as off-duty outfits. The Besi model uses a bio-based polyamide derived from castor oil to achieve a featherlight feel and impressive durability – useful when you wear glasses for long stretches. For buyers who value longevity, sophistication, and sustainability, the Gotti Besi eyewear is an easy recommendation.