Fender Cover f/A-4 Ball Style - Black. Fender covers should be as tough as the fenders they protect. That's the criteria we used in developing the Elite Fender Cover series. Polyform uses a premium grade yarn that is resistant to sunlight and abrasion. They are womven by a special knitting machine that produces a seamless tube so you don't have to worry about seams splitting and allows for a heavier yarn content. The result is a fender cover that is built to last for many years and not just a season.. Features:. Hand-crafted with heavy duty polyester fabric for durability.. Washable. Custom fit for a tailored look. Drawstring closures instead of elastic - which can become brittle and break. Quick and easy installation. Limited three year warranty