Use a 2-layers system providing easy gliding between the inner/outer linings thus reducing friction on your boat’s hull and gelcoat. Made of Nylon/Elastane (spandex) fabric for better colour and appearance. Eliminate rubbing noises from friction alongside other boats or docks. Protect your gelcoat against scratches and rubbing marks. Keep your fenders clean and gum free. Increase your fender’s lifespan. Fast and easy installation, Washable. 15 Inches.