The shift from traditional, hard-edged designs to modern, more aerodynamic forms marks a pivotal point in automotive design. In the past, bumpers were bulky and designed to absorb impact, often making vehicles appear more rugged and less refined. The materials used were heavy and prone to rust, which further limited their appeal in a world increasingly focused on weight reduction and fuel efficiency. As a result, automakers began seeking alternatives that could still provide strength and protection but with added benefits such as lighter weight, better fuel economy, and enhanced aesthetics. This led to the development and widespread use of plastic-based bumper materials like polypropylene and polyurethane, which offered the necessary resilience while being much lighter than their metal counterparts.