The Maui Jim Castles Polarized Sunglasses are a refined aviator style featuring a classic design constructed with a monel metal and nickel silver frame with SuperThin Glass lenses, and is a great choice for folks demanding a durable, comfortable, high-performing sunglass. Castles also feature adjustable rubber nose pads providing additional stability during any activity.Durable, scratch-resistant SuperThin glass lenses are 20% thinner and lighter than standard laminated glass lenses for long-wearing comfort, whether youre driving or relying on them every day. 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. Frame is durable, lightweight monel metal material with nickel silver and acetate temples. Classic aviator shape best complements oval or oblong face shapes. Saddle-style fixed bridge with adjustable nose pads. Traditional pin hinge. 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 is a great pick for everyday variable conditions, from full sun to overcast. Provides excellent contrast. Great if you love a warm, subtle bronze tint.