KULA Polarized Shield Sunglasses Description Frame: Gloss Black Lens: Maui HT™ - When most lenses would be too dark, this "High Transmission" lens offers extra contrast and color. Lens Material: Polycarbonate - A proprietary, silicone-based hard coat that protects your lenses. Glass is naturally scratch resistant but polycarbonate lenses perform better longer with the added durability of our optically correct CLEARSHELL®. SKU: HT514-02