Ray-Ban ® RB4120 sunglasses are lightweight and easy-going. This men's casual full square sunglasses style is constructed of propionate plastic material. The RB4120 also features crystal lenses and polarized lens options. An engraved Ray-Ban ® signature end piece leads into the lightweight hytrel temples on these sunglasses. A great fit for medium to large face sizes and an "on the move" style of sunglasses.