Abstract: Disclosed herein are a protective cover and related system for protecting a vehicle from the elements, as well as methods of manufacturing the same. In one embodiment, a protective cover is provided that comprises an inflatable flexible air chamber having a rectilinear shape and sized to entirely cover an upper surface and sides of a vehicle, the air chamber having a length and a width each at least 10 times its thickness. In addition, the protective cover may comprise a valve connected to the air chamber for inflating the air chamber, and a hem surrounding the perimeter of the air chamber and laterally extending therefrom. In such an embodiment, the protective cover may also comprise fastening mechanisms disposed in the hem for securing the air chamber to the upper surface and sides of the vehicle.