Free Shipping & Easy Returns! Explore Costa Mariana Trench 510 Eyeglasses now. Costa Mariana Trench 510 is a Progressive Eligible frame for Men and Women, 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. Costa Mariana Trench 510 Eyeglasses come with a cleaning cloth and protective carrying case. About Costa Eyewear Costa eyewear is made for those with an active lifestyle, bringing a healthy dose of fashion to the beach or trailhead. Polarized sunglasses, eyeglasses, and C-Mates bifocal readers by Costa will help you navigate in any direction your adventure leads. Created by fisherman for fisherman in the late 1980s, Costa continues to create quality sunglasses and eyeglasses with innovative technologies. These performance glasses were "born on the water," and they’re made to last—each pair is a worthy investment. 100% Authentic Costa FramesDirect.com is an authorized Costa dealer, selling only 100% authentic Costa eyeglasses frames. Made for men and women, each Costa prescription eyeglasses frame comes with its original brand markings, meticulously crafted to meet your high expectations.