Protect your investment with our fast and easy to install BoatVent II. The BoatVent II can be added to any custom or semi custom marine cover. Made with the latest UV inhibited polymers you can be sure it will withstand the elements. This remarkable devise prolongs the life of your boats upholstery by venting the enclosed space of the warm, moist air. With millions sold this combination has become the standard for preventive care in the industry, and is a must for all boat owners.