A plurality of major sheets, each formed in a rectangular configuration having first and second long end edges, first and second short side edges, upper and lower surfaces, and a plurality of X-shaped slits each slit having a center and four ends. A plurality of minor sheets, each in a square configuration of a size to cover an associated X-shaped slit. Four lengths of linear stitching couple each of the plurality of minor sheets to the lower surface of an associated major sheet perpendicular to the ends of the X-shaped slits. Each of the four lineal lengths of stitching are spaced from adjacent lengths of stitching to create four water passageways between the major and minor sheets.