Polyform US has been manufacturing F-Series fenders for more than 50 years. The fender is rotationally molded, resulting in uniformly thick walls, high strength and long life. It is made of high-gloss, heavy-duty material and has a pressure-proof valve. The fender has a large protection area, 70-76%, and is considered to be of the highest quality and durability. F-series fenders provide protection for everything from small boats, pilotage, commercial vessels and the Navy and Coast Guard.