Product Description: Boat Vent II Protect your investment with the 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. BoatVent II helps prevent mold, mildew, and bacteria from growing under your cover, and causing irreversible damage to your boat's interior. When combined with our cam-lock support pole, the added support of proper tenting will shed rain or snow, prohibiting pools and stagnant water from destroying your cover. This combination has become the standard for preventative care in the industry, and is a must for all boat owners.