Classic, but with an edge, Mongoose is a universally-appealing rectangular polarized sunglasses frame that's also available in one of our newest mirror treatments - MAUIGreen. The lightweight nylon frame with rubber-coated temple tips, spring hinges, and embedded nose pads give this frame a snug fit-sure to stay in place regardless of your activity. And the SuperThin Glass lenses offer the most colorful and unforgettable views. Lens Material: SuperThin Glass - Provides the absolute crispest optics available. 20% to 32% thinner and lighter than standard glass, it offers the best scratch and solvent resistance.