Duplex forming fabric

A paper forming fabric having two layers of synthetic weft strands with interwoven synthetic warp strands and approximately 100% warp fill, the upper surface of the fabric having a plurality of knuckles formed by said interwoven weft and warp strands being essentially tangent to the plane of the fabric on which the paper is to be formed, and wherein the upper layer of the said fabric comprises a regular array of mesh openings which are spaced apart in the weft direction by a distance not greater than the thickness of a single intervening warp strand and in the warp direction by a distance not greater than the thickness of a single intervening weft strand, said meshing openings being defined by the spacing between adjacent upper weft strands and by the spacing between warp strands which are held separated within the body of the fabric by at least one intervening warp strands, said at least one intervening warp strands being woven with lower layer weft strands and extending in its entire length below said top layer weft strands, said weft strands in a lower layer of the said fabric being deplexed, at the most, under every second weft strand in said upper layer whereby to allow better drainage throughout the thickness of the fabric.