Abstract: A docking seal for a loading dock opening in a wall, comprising a rigid backing for attachment to the wall about the opening and a yieldable facing held distended therefrom by air pressure introduced between the rigid backing and yieldable facing such as to form a continuous air chamber peripherally of the opening wherein the back wall of the chamber is constituted solely by the rigid backing and the front and side walls by the yieldable facing. The rigid backing comprises three frame members for disposition across the top and along the sides of the opening, hinged at adjacent ends to enable folding the frame members in a superimposed relation with the deflated facing secured thereto, so that the seal may be shipped and/or stored in collapsed condition.