LENS Aspherical lenses: They are the result of the latest technology, thinner in size and with zero distortion, so as to ensure perfect peripheral vision. Made of organic material, highly resistant to scratches. Aligned optical centers. Distance between the pupils of the eyes 62mm. SKELETON Made of hypoallergenic materials, thermoplastic acrylic or durable metal (polycarbonate, alpaca (nickel silver), nylon). Arms with Flex System mechanism, bearing the Zippo logo. Frame of Italian design.