Martini M48 sunglasses Feature Martini's New 8 Layer "Ultra Polarized" Glass 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 M48 features a Handmade Acetate frame fitted with Optical spring hinges. Eye size / Lens width = 59mm. Bridge size / Distance between lenses = 16mm. Temple length = 135mm.