Polyform US F Series Boat Fenders A versatile heavy duty boat fender made by Polyform and manufactured in the USA Polyform F Series Boat Fenders are made from a single piece of industrial strength flexible vinyl Designed for heavy use in challenging conditions, the F Series is Polyform' s premier boat fender This product ships deflated inflate using 1) a Polyform Inflation Adapter with any standard tire pump connection 2) a tapered nozzle blow gun or 3) a Polyform specialty hand pump