surface 78 of the first trim piece 72 to form a first seam generally shown at 98 more specifically the first stitching material 18 passes into the aperture 94 out of the aperture 94 and then abuts at least a portion of the plastic liner 88 of the bottom surface 78 of the first trim piece 72 between the spaced apart apertures 94 in the first trim piece 72 similarly the continuous second stitching material 60 passes through and between each of the apertures 96 along the bottom surface 82 of the second trim piece 74 to form a second seam generally shown at 100 more specifically the second stitching material 60 passes into the aperture 96 out of the aperture 96 and then abuts at least a portion of the plastic liner 88 of the bottom surface 82 of the second trim piece 74 between the spaced apart apertures 96 in the second trim piece 74 the second stitching material 18 loops around the first stitching material 60 between the bottom surfaces 78 82 of the first 72 and second 74 trim pieces more specifically the first stitching material 18 loops around the second stitching material 60 between the trim cover materials 84 of the top surfaces 76 82 of the first 72 and second 74 trim pieces a plurality of interwoven first strands 28 form the first cover material 28 and a plurality of interwoven second strands 62 form the second cover material 62 the first stitching material 18 loops around at least a portion of the interwoven first strands 28 to pull the first cover material 28 against the.