These designer prescription glasses are made to accommodate most prescription lenses.Flexon Flexon 607 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.Flexon Flexon 607 frames feature a fashionable semi-rimless frame design, with a rim at the top and no rim underneath the lens. This design serves to reveal more of the face, and provides for a lighter frame weight.The frame has a Unifit.Designed for adults, this model has a Spring type hinge for greater comfort.2-year 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 Flexon Flexon Glasses The Flexon glasses collection is a great choice for anyone looking for a durable, functional, and stylish pair of glasses. The frames are made from unique "Flexon" high-quality materials which distinguishes it from a conventional metal frame, and come in a range of styles. In terms of fashion, Flexon collection features a sleek, minimalist design that is both timeless and modern. The frames are slender and understated, making them a great choice for both men and women. Memory metal combined with light weight and fashion forward designs makes Flexon glasses a great choice for prescription glasses.