Free Shipping & Easy Returns! Explore Costa Mariana Trench 100 Eyeglasses now. The Mariana Trench 100 eyeglasses from Costa are an ideal blend of form and function. These unisex rectangular frames are made from hypoallergenic plastic that’s lightweight but sturdy, resulting in comfortable glasses you can wear all day long. The skull temples curve inward gently to keep the glasses from slipping during water activities, and offer an additional appeal. With their classic styling, these Mariana Trench eyeglasses will easily complement your wardrobe whether you're at work or play. 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.