Abstract: A unidirectional reinforcing fabric and a resinous laminate made therewith, which fabric includes a weft knit yarn fabric formed of a multiplicity of weft knit stitches and a multiplicity of parallel longitudinally extending warp inserts held in said weft knit fabric. A bi-directional fabric is also disclosed which includes in addition to the above a multiplicity of parallel transversely extending weft inserts. Each insert includes a multiplicity of continuous monofilaments extending longitudinally in parallel relation with respect to one another without crimp or twist and grouped closely together so that the outline cross-sectional configuration of the group is approximately in the shape of an elongated rectangle. Each monofilament of each insert is formed from a material taken from the group consisting of glass, carbon and aramid and has a cross-sectional diameter of between 0.00032" and 0.00095". Each insert has the thickness of the rectangular cross-sectional configuration thereof between 0.003" and 0.