Maui Jim's Kanaio Coast is designed with adventurists in mind but is built with a lightweight injected nylon frame and hidden spring hinges for a customizable and comfortable fit for any activity level. The Blue Hawaii blue mirror coating provides a stylish new look that offers the same amazing color enhancement and clarity as all other Maui Jim lenses. Lenses featuring SuperThin Glass provide the absolute crispest optics available and are 20% to 32% thinner and lighter than standard glass. This is your perfect pair!