Inspired by the wave called Ma'alaea, or freight train, the Maui Jim Freight Trains Polarized Sunglasses are a great pick for the ultimate in eye protection, on or off the water.Maui Evolution? polycarbonate lenses are extremely lightweight, scratch and impact resistant. Patented lens treatments bring the worlds true colors to life. With the high-performance optics you need to keep up with your outdoor sports. 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. MauiFlex memory metal frame with proporietary material remembers fit and shape longer than traditional metal frames as well as being durable and featherweight. Rectangular frame complements virtually any facial shape. 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.