A rectangular first sheet has a right side, a wrong side, and side edges. A pair of vertical straps are fabricated of an essentially inextensible strapping cord. Selective stitching couples each vertical strap to the wrong side of the first sheet with each vertical strap extending beyond the first sheet and parallel with and spaced a distance from an adjacent side edge. A pair of horizontal straps are fabricated of an essentially inextensible strapping cord. Additional selective stitching couples each horizontal strap to the wrong side of the first sheet with each end of each horizontal strap extending beyond the first sheet. A loop is formed at each end of each strap to create handles. A second sheet is in a rectangular configuration. Peripheral stitching couples the first sheet and the second sheet with the straps between the sheets.
