Men Sunglasses Tac Polarized UVA UVS UVC Protection Frameless Colors: As Shown in Photos (Yellow Sunglasses are Night Vision Driving Glasses) Spring Loaded Reinforced Metal Hinges allow for a smooth opening and closing operation Tac Technology Polarized Lenses: Tri Acetate Cellulose (TAC) polarized lenses feature a new lens technology formulated for superior visual and polarization clarity.