MOYAI DRAIN MAT and MOYAI DRAIN PIPE are made of polypropylene which has the best chemical resistance among the high polymer materials and is a striae bonded three-dimensional net structure drainage material. However, it is different from a normally three-dimensional net-shaped body (sponge structural state) in terms of its internal structure which has spiral core tubes randomly placed in-flow direction. This new structure formed in single-piece is the ideal material with the function for collection the water from the surface of spiral body and of the permeability by the cavity inside in a material moreover it has a very high performance of pressure resistant.