NRG Carbon Fiber Bucket Seat (Medium) - RSC-311Fiber Glass Bucket Seat with Carbon Fiber Medium Carbon Fiber (not FRP) finish. Our first extra deep racing seat, in Medium, with leather patches in the high traffic areas to prevent premature wear. True to our decade old design which actually inspired our newest and most successful line of seats. The RSC 311 sports an extra layer of FRP for added rigidity, while featuring similar comfort and style as some of the more expensive seats in the category.