Acetate Glasses With Nylon Lenses With An Anti-Reflective Coating On The Inside.Nthis Unbreakable Lens Material Also Guarantees Maximum Protection From Uv Rays.Nthe Particular Craftsmanship That Goes Into These Models, Which Are Worked By Hand Using A Pantograph, Makes Each Piece Unique.Ncr39 Uv400 Lenses With Double Anti-Reflective Coating; Filter Category 3 According To En Iso 12312-1.