formed of pet having a denier of 550 although any polymer rendered effectively inelastic will suffice the middle warp yarns 107 are heat set under tension to make them straight and inelastic a plurality of binder warp yarns 120 121 122 are woven on the weft yarns to form a belt fabric the fabric layer 101 is woven in a repeating weaving pattern wherein three binder warp yarns 120 121 and 122 are woven through a plurality of adjacently disposed couplets formed from aligned pairs of weft yarns of layers 105 and 106 in a specified pattern in this pattern the first binder warp yarn 120 extends over a first aligned couplet of weft yarns 110 and under second and third couplets 111 112 respectively the second binder warp yarn 121 extends over the second couplet 111 and under third and fourth couplets 112 113 respectively and the third binder warp yarn 122 extends over the third couplet 122 and under fourth and fifth couplets 113 114 respectively the specific pattern of the warp yarns shown in fig2 is further illustrated in fig3 in which the pattern of a single binder warp yarn 120 is shown separate from the other binder warp yarns fig4 depicts an alternate embodiment of a belt 200 in accordance with the invention wherein the fabric 201 comprises four binder warp yarns 220 221 222 and 223 woven into two layers of weft.