Abstract: A polyaryletherketone biomaterial launched by Victrex and marketed as PEEK-OPTIMA, is suitable for medical implant use, enabling device manufacturers to make high performance implants with tailored properties that are compatible with modern medical imaging techniques. This family of products, manufactured under conditions of ‘no change’ has been achieved using enhanced manufacturing procedures, backed-up with extra physical, chemical or mechanical testing at key stages of manufacture. This paper describes aspects of PEEKOPTIMA manufacture, testing and application.