Electric Back Line sunglasses. Premium-quality Italian craftsmanship, a sturdy, sculptural silhouette and refined details make this frame an instant classic with timeless appeal. Achieving a powerful balance of style and substance, the Back Line is the very definition of understatement. 6 base mold injected grilamid frame. 5 barrel stainless steel optical hinge. 6 base polycarbonate lens. 100% UV protection. 98% HEV protection. Imported.