https://www.carcovers.com/covers/jet-ski.html – Jet ski covers at CarCovers.com. The Weatherproof Shield Jet Ski cover is made from a durable all weather UV treated PolyShield material. Designed to provide effective weather protection at a fantastic value. Built-in air vents serve a dual purpose: increased air flow and protection from trapped moisture. Free shipping to all of the U.S and Canada!