Profile: Performance Fibers, Inc. supplies high-tenacity polyester fiber. We serve the automobile tire reinforcement and engineered reinforcement industries. Our product line includes polyester fiber, roofing reinforcement fibers, polyester fiber and high performance fibers. Our Beltec® fiber is a new tire reinforcement specifically designed to enhance the performance of tires with cap plies. Our DSP® high performance fibers are used in industrial and consumer applications.