These designer sunglasses cannot take prescription lenses.Made of Nylon.Maui Jim Southern Cross 815 frames have a rectangle shape, which helps to balance rounded facial features. Frame shape is the most noticeable feature of a pair of glasses, followed by frame color and frame size. Top brands always have a large collection of rectangle frame shape glasses, as well as oval frame shape glasses.Maui Jim Southern Cross 815 frames feature a fashionable full frame design, which is the largest component of designer eyeglasses brands collections. A rim all the way around the lenses, provides for maximum stability and durability.Material defects or workmanship: 24 month warranty. The warrantee by the manufacturer covers manufacturer's defects for the frame. As an online optical superstore, we can help to process a warrantee for you with the manufacturer, according to their return policy. See all Maui Jim Maui Jim Sunglasses Maui Jim sunglasses are created to follow popular contemporary trends in fashionable sunglasses, and they are engineered to balance aesthetics with fit and classic stylish integrity. Along the way, Maui Jim sunglasses exhibit new ways to combine advanced construction techniques with new frame materials, which add up to the lightest and most comfortable designer frames possible. Maui Jim sunglasses show the finest design details in their engineering and manufacturing, resulting in a premium, functional, comfortable and elegant pair of sunglasses. All Maui Jim prescription sunglasses are available with prescription lenses at our Westport, CT store. ...Read More