Martini M33 sunglasses Feature Martini's New 8 Layer "Ultra Polarized" Polycarbonate Lenses with "Hardshell" proprietary scratch resistant coatings, "AR" anti reflective treatment to reduce rear and side glare and an Oleophobic coating which includes a Hydrophobic treatment that seals the lens surface and reduces the adhesion of grease and water. This makes a lens very easy to clean. These lenses are very strong and great for sports activities, driving, fishing and all around daily use. The M33 features Italian Optical spring hinges. Size 56-15-135. Overall height = 35mm or 1 3/8 inches