Both polycarbonate and polypropylene are top-of-the-line bag materials. Polypropylene is a lighter, but less flexible, alternative to polycarbonate. Polycarbonate has built-in flex, making it more resistant to knocks and hard impact than polypropylene. Polycarbonate also outperforms acrylic in durability testing and is scratch-resistant by nature. Polycarbonate is used in Antler‘s best-selling Clifton case, while polypropylene is used in Antler‘s Lincoln and Portobello cases.