I-Twill wuhlobo lwendwangu eluka ngephethini yezimbambo ezi-diagonal parallel (ngokungafani ne-satin ne-plain weave). Lokhu kwenziwa ngokudlulisa intambo ye-weft phezu komucu owodwa noma ngaphezulu we-warp bese ngaphansi kwemicu emibili noma ngaphezulu ye-warp njalonjalo, nge- “step” noma nge-offset phakathi kwemigqa yokwakha iphethini ehlukanisayo.