Martini Stainless Performance M54 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 M54 features an All Stainless frame with Optical spring hinges. Lens size 50mm Bridge size 19mm Temple Length 135mm. Each lens is 28.8mm tall and has a 6 Base Curve. This entire sunglass has a total weight of 13 Grams.