The outer structure of most Weber outdoor barbecue grills is made of tempered stainless or porcelain-coated steel. These materials hold up well to the element of grilling. However, they are subject to wear and corrosion if not covered properly. Thus, Weber BBQ covers are important as they provide additional protection that keeps grills functioning perfectly and free from rust for years.
There are several universal or one general size of covers for all grills that are sold on stores to date. They are usually made from heavy canvas or nylon, and provide sufficient protection for Weber outdoor BBQ grills.
There are also custom made covers manufactured by Weber itself that is specially made for covering a certain model of grill. These covers typically allow wind to pass over the top and the bottom of the grills, making it hard to be swept away by strong winds.