This boat cover fits the most common hull styles and sizes and is suitable for mooring and storage applications. The boat storage cover is made of durable oxford fabric that is mildew resistant and water repellent to protect your boat from bad weather conditions. The boat canopy is also equipped with quick-release buckle straps that allow you to lock the cover with your boat and prevent it from being blown away. It also comes with a storage bag for convenient carry and protection when it not in use. Note:In order to choose the right size cover, please measure your boat firstly!1. Measure the center line length.2. Measure the beam width.3. If boat length falls between cover sizes, choose the larger size for best fit.