Abstract: The present invention is directed to a protective cover having a first panel superimposed over and connected to a second panel. The first panel is connected to the second panel such that the first panel is slidably moveable relative to the second panel so that the first panel will be sheared relative to the second panel upon the first panel being impacted by a force having a component which is non-perpendicular to the first panel. Each of the first panel and the second panel has a top sheet and a bottom sheet. The top sheet is connected to the bottom sheet to form an air chamber. A valve is disposed through the panels and manually operable between an open condition and a closed condition to allow air to be selectively removed from and drawn into the air chamber of the first panel. The air chamber is provided with a resilient, open-celled, foam panel to cause air to be drawn into the air chamber upon expansion of the foam panel from a collapsed condition.