NRG FRP Fiberglass Bucket Seat (Medium) Black water resistant vinyl material - FRP-310GY-SHIELDFiber Glass Bucket Seat SHIELD ( Water Retardant) Water Proof! Our original Bucket Seat, in Medium. True to our decade old design which actually inspired our newest and most successful line of seats. The FRP 310 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. These seats are meant to look good, feel good, and weather the elements better than the rest.