The Rolf Ulua M is an optical frame made from Substance, Rolf's proprietary plant-based material derived from castor beans. 3D printed in the Tyrolean Alps, Austria with a patented Flexlock hinge, each frame is lightweight, flexible, and fully sustainable. Rolf Substance won the European Green Award for pioneering eco-friendly eyewear design. Available at Visionary Optics' three NYC locations or online with same-day ZEISS prescription lenses. Substance is made from the purely plant-based material of the castor bean and impresses with its fantastic wearing comfort, robustness and simultaneous lightness. The patented Flexlock® hinge makes the frame flexible and very durable at the same time. Handmade in Austria Sustainably produced Plant-based material High-quality lenses Patented Flexlock® joint MeasurementsA:52 B:40 DBL:17
