An interwoven belting fabric for using conveyors, including treadmills, is constructed of a dual layer of weft yarns comprising adjacent couplets, and a plurality of binder warp yarns. Each binder warp yarn extends over of couplets of weft yarns, and under a plurality of adjacent couplets of weft yarns so that the warp yarns extends under more couplets in the lower layer then extends over couplets in the upper layer.