Nothing sets off an upholstery job better than a French seam. A French seam (Double Top Stitch) is often found in luxury vehicles and boat upholstery. Often used when sewing panels of leather, faux leather or vinyl seating fabric together. Combined with thick thread a French seam will make your next upholstery project really look great. Get noticed, consider using French seams! For this technique you need a proper sewing table.