Master Fender Covers F-4 - 9" x 41" - Double Layer - BlackF 4 9" x 41" Double Layer Black The F Series are double layered making them softer, more durable & reversible. Master Fender Covers are specially designed to protect the topsides and hull from fender scuff and reduce the need for expensive gel coat repairs. They are made from a premium stain resistant, non abrasive, loop knit acrylic fabric, which is both durable and fade resistant. They are available in a variety of colors and sizes to suit your