Excellent condition, no scratches, flaws or signs of wear No case Grey lenses Costa Goby is more than just a pretty face. Its nylon frame construction, no-slip nose pads and flexible spring hinges offer a “forget-they’re-on” fit. Costa’s patented 580™ 100 percent polarized lens technology blocks yellow light from entering the eye, creating razor sharp color enhancement and eliminating reflective glare. The lenses are lightweight and impact resistant.