In its minimal version it has a ratio of three wires and three plots. Unlike the canvas, the binding points are arranged diagonally and thus determine the surface of the ribs and the parallel grooves with a 45 ° inclination when the orderly and weft reduction is the same and when it is equal to the diameter of the yarns. The fabrics made of sax armor have the unequal right and the reverse, which are technically distinct in heavy and lightweight: the heavy effect prevails on the warp, on the light effect the weft. Saw is found to be poorly used in drapery or bedding fabrics, except for gabardines. Instead, it is much more used in lightweight silk or silk wool fabrics and cotton fabrics (jeans, drill, levantine, etc.).