Abstract: An inflatable air pad, or fluid impervious pad, is provided having three layers, the top and bottom being joined together to form an enclosed envelope with a middle layer interposed between defining an upper and lower chamber. Fluid is allowed to flow from one side of the middle layer to the other, such that there is uniform pressure throughout. A sealable port is provided in the enclosed envelope for the injection of fluid under pressure. The middle layer is attached to the top layer in a series of seals or attachment points in a rectangular array and is similarly sealed to the bottom layer in a similar rectangular pattern; however, the two patterns are positioned 180 degrees out of phase with each other. These patterns form a series of small cushion areas in the upper and lower chambers respectively and the cushion areas are nested within each other on an offset basis.

Abstract: In an inflatable pad or mattress, or a pad of fluid impervious material for holding fluids of any type, securement straps are provided of the same sheet of film material which is used to form the main portion of the pad. The securement straps are designed to fit around and under the corners of a standard bed mattress to hold the pad in position on the mattress. The film material which forms the main body of the pad is die cut such that four straps are provided at each of the four corners of the pad with each strap being connected to the pad at approximately the center of the ends of the pad and at a point along the side of the pad spaced from the corner.