Montblanc Havana & Green Square Acetate SunglassesExperience timeless elegance with the Montblanc MB0302S 002 sunglasses. This model features a classic square or rectangular square shape crafted from high quality Havana acetate (often shiny dark havana). The solid green lenses provide a sophisticated contrast and excellent UV protection. Part of the "Nib line," these sunglasses may feature subtle metal Nib icon detailing on the endpieces, reflecting Montblanc's heritage in fine writing instruments.