Smith Optics Touchstone Sunglasses are medium-fit outdoor sunglasses that reach a new level of comfort and visual performance. The Smith Touchstone Sunglasses are the definition of leadership. Theseimage Smith Sunglasses feature refined surfaces and detailing combined with maximum coverage, a secure fit, and strong styling. Smith Optics builds the Smith Touchstone Sunglass with a Grilamid TR90 frame, made of a resilient and lightweight plastic for durable all day comfort. The Carbonic Sunglasses lenses are as lightweight and durable as the sunglasses frames. Carbonic is the most durable sunglasses lens material in the industry. Smith Optics injection-molds the sun glass lenses with their Tapered Lens Technology (TLT) for perfect optical precision, and adds an anti-scratch coating to keep them fresh. Quality fashion is what Smith Optics Sunglasses are all about.