The weather resistant fabric protects against fading from UV rays and taking the cover off and on is easy with its convenient handle. The cover is ventilated to prevent moisture build up. Always wait for your EGG to cool before covering. This cover will offer protection against the elements to an EGG in either a metal nest & handler or a royal mahogany base. It is made from a heavy-duty material and is designed to work perfectly for years to come! PLEASE NOTE: This cover will not fit the Medium EGG in any other configuration.