The most common materials are Carbon Fiber (CF), Polypropylene (PP), and Acrylonitrile Butadiene Styrene (ABS). Carbon Fiber is the premium choice, offering the highest strength-to-weight ratio and a high-end aesthetic, though it is more brittle. PP plastic is the industry standard for aftermarket bumpers because it is highly flexible, impact-resistant, and offers a fitment closest to Original Equipment Manufacturer (OEM) standards. ABS is rigid and cost-effective but can crack under extreme stress compared to PP.