The Maui Jim Kahuna sunglasses are as distinctive as the Kahuna Falls on Hawaii's Big Island. This modified aviator style sunglass is one of Maui Jim's perennial best sellers. The Kahuna's high-quality lens combines PolarizedPlus Technology and optically correct, distortion free vision with a carefully crafted frame. A polarized lens' primary function is to reduce glare--that is, light reflected from a flat surface which greatly diminishes color and contrast. A body of water, a windshield, and even an asphalt road are all notorious producers of polarized light. Polarized lenses are most useful when trying to see through these reflecting surfaces, like when fishing, boating, or driving. Maui Jim sunglasses feature one of the most effective polarized lenses on the market. They are lightweight, tough, and very stylish.