Single-layer BOM is made of single-layer base cloth layer and fiber layer. The base cloth layer is made of nylon yarn or warp and weft weave by doubling monofilament. The stitch structure designed by different paper machine, different positron and different paper. According the structure of BOM to lay the fiber. Having the characteristics of good filterability, small elongation, easy to wash and clean, light mark, affective to eliminate grain mark and other marks, long life and so on. Widely used for kinds of paper machine to product kinds of paper & paper board.