Our interchangeable lenses aviator sunglasses has a whole new approach to being fashion forward. Our engineering approach makes this sunglasses design ultra flexible, just lift the front clasp and swap out the lenses at your convenience. Our frame is made from a temper treated steel to support the FLIP mechanism that is mounted on the frame chassis. Our lenses are all CR39 high grade optical quality lenses, with UV400 protection. Whether you simply change the color of the lenses, or change the lens design, you can express yourself anyway you choose.