12.3 oz high power stretch denim S766-44.10.2.2BKH.1 Stretch Heavy Ounces The warp yarn is the original weak slab No. 9, CSY No. 10 using lycra 105 d is used for the weft yarn, and it is a stretch material finished in a process that keeps the reduction ratio low while it is high power. It is a material for skinny pants.