Carbon Racing Seats
Advantages of Carbon Fiber for Racing Seats
Carbon Fiber is stronger and lighter than fiberglass, and is used in high end seats. Carbon fiber has tremendous stiffness and strength for it's mass. It does flex, however, which some may see as an advantage. Some serious racers prefer aluminum seats over carbon fiber for stiffness.
Carbon Fiber: the Premium Choice
With carbon fiber, though, there is matter of the cost: carbon fiber is certainly a premium choice, and you can expect to pay more for a true carbon fiber seat.