Free Shipping & Easy Returns, plus Price Match! Explore ECO Carson Eyeglasses now and enjoy the latest promotions on ECO frames. ECO Carson is a Full Rim, Progressive Eligible frame for Men, which is made of Acetate. Acetate is the most common material used for frame manufacturing. It has endless possibilities for color, texture, and patterns. It can even be laminated to create great visual effects, and it can retain a higher luster. Acetate is lightweight, so it is often chosen for its versatility in coloring as well as for its comfort. Acetate is made out of cotton seed fibers and plasticizers. This model features a Rectangular shape, with a Single Bridge. This frame features a spring hinge, which keeps its initial balance and adjustment, thereby avoiding the need for subsequent adjustments. ECO Carson Eyeglasses come with a cleaning cloth and protective carrying case. Additional Information: ECO Cameroon Story (PDF)