Costa Mens Costa Luke 580 Glass Glass Lenses^Nylon Imported Nylon frame Glass Lenses lens polarized Lens width: 55 millimeters Lens height: 42 millimeters Bridge: 19 millimeters Arm: 123 millimeters Glass provides the best clarity in material Encapsulated mirrors (between layers of glass) are scratch-proof 20% thinner and 22% lighter than average Polarized glass 100% UV blockage for maximum protection 100% polarization kills reflected glare