Shop Rayban Aviator LiteForce. The Iconic Ray-Ban Aviator is redefined in the Liteforce sunglasses series. These sunglasses are made of a new bio-material semi-crystalline thermoplastic used in aerospace, automotive and medical implant technology. The innovative material of the Aviator Liteforce RB4180 provides superior lightness, durability and comfort in a plastic frame design. The unique construction of the Aviator Liteforce allows for the same thickness of the metal Aviator Classic but with extreme lightness. These designer sunglasses offer a variety of lens treatments including polarized and Mirror and contain a hydro-oleophobic coating which resists liquids from falling on the lens.