The particularly lightweight frame of these sunglasses is made using 3D printing technology and 100 per cent organic material based on castor beans. The electricity needed for the production comes from renewable energy resources. Thanks to a metal inlay in the temples, the frames can be adjusted without heat and permanently keep their shape. The smooth surface finish prevents colour fading as well as the accumulation of germs and ensures a good grip. A compact hinge rounds off the eye-catching design.