Abstract: The present invention is directed to a collapsible cover for protecting an occupant in a seating unit having a head region and a foot region. The cover has a body comprised of a flexible material having a top portion and at least one side wall portion, the top portion having a generally ellipse shape and having a length to span the distance between the head region and foot region of the seating unit and a width to span the width of the seating unit. The sidewall portion is connected to the top portion along a substantial portion of the periphery of the top portion to provide an arched configuration to the top portion. The cover further has a single closed loop frame member made of a flexible, coil-able, resilient material, that is secured along the length of the structure's membrane body so as to assume an ellipse-like shape when viewed from above, that is bent into an arched configuration about its minor axis.