Martini Stainless Performance M53 sunglasses Featuring Martini's New 8 Layer injected "Ultra Polarized" 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 the Best in the World! The M53 features an All Stainless frame with Optical spring hinges. Size 54-19-135. 8 Base Curve Lenses. This entire sunglass has a total weight of 17 Grams.