BE THE CENTER OF ATTENTION IN THE MAUI JIM MONGOOSE POLARIZED SUNGLASSES.A lightweight design and nylon frame can never go wrong, especially with The Maui Jim Mongoose Polarized Sunglasses. They feature rubber-coated temple tips, spring hinges, and embedded nose pads that will help you stay snug and comfy all day long. People won't be able to leave you alone with these on. FEATURESNylon is a thermoplastic material that is blended in order to counteract its initial brittleness. Nylon blends are lightweight, stable, and resistant to breakage. Nylon has less of a tendency to bleed it's plasticizers resulting in great hypoallergenic properties. It can be blended with polyamides,grilamid, or trogamid.This model features a Rectangular shape, with a Single Bridge.This frame features a spring hinge, which keeps its initial balance and adjustment, thereby avoiding the need for subsequent adjustments.