Armoursight Lenses Are Engineered For Superior Optical Clarity And Impact Resistance Ultralight Armourfusion Frames Are Built For Maximum Strength And Durability Screwless Cam-Lock Hinges Allow Temples To Lock Securely Into Place For A Sturdy & Extremely Lightweight Fit Medium-Large Fit Lens: 56 Mm Nose Bridge: 18 Mm Temple: 136 Mm