Gast Dear Friday Square Sunglasses pair a sculptural acetate frame with semi-flat nylon lenses for reliable sun protection and a modern rectangular profile. Key attributes: Black | Acetate | 100% UVA/UVB protection | Anti-reflective inside coating | Five-barrel metal hinges | Includes premium hard case | Includes microfiber cleaning cloth | Square / rectangular frame | Full-rim acetate frame | Semi-flat nylon lenses | Dimensions & fit: Front width 143 mm | Front height 40 mm | Lens width 51 mm | Lens height 32 mm | Temples length 145 mm | Bridge 21 mm | Comfortable rectangular fit | Composition & care: Acetate | Nylon | Metal | Clean lenses with the included microfiber cloth and lens cleaner; store in the supplied hard case when not in use; avoid abrasive cleaners and prolonged exposure to heat.