Maui Jim River Jetty Polarized Sunglasses are inspired by the French word jet?e meaning ?thrown?, like water thrown or moved to prevent a beach from washing away. But don?t throw these beauties away? they?re the best for cutting glare at the beach, or on the road.Polycarbonate lenses are extremely lightweight, scratch and impact resistant, injection molded for crisp optics. Patented lens treatments infuse your view with vivid color. Your lightest choice for long days in the sun. CLEARSHELL? proprietary, silicone-based hard coat on the front and back of the lense protects the lenses, adds durability and is optically correct. PolarizedPlus2? patented, color-infused lens technology wipes out 99.9% of glare, 100% harmful UV and boosts color via specially designed lens treatments for clearer view with crisper contrast and amazing brilliance. Grilamid frame is lightweight and tough. Modified rectangle with a form-fitting design and non-slip temples and nosepads. Anti-corrosive, stainless steel pin hinge offers lightweight strength. Neutral grey lens is perfect for especially bright, direct sunlight. Offers rich color and contrast along with the highest available light reduction, unlike ordinary grey lenses that flatten light evenly across the spectrum. HCL Bronze lens for everyday variable conditions, from full sun to overcast. Provides excellent contrast. Great if you love a warm, subtle bronze tint.