ʻO Twill kahi ʻano ulana ulana me ke ʻano o nā iwi ʻaoʻao like diagonal (ʻokoʻa me kahi satin a me ka ulana maʻamau). Hana ʻia kēia ma ka hala ʻana i ka pae ulana ma luna o hoʻokahi a ʻoi paha mau ʻili o ka maʻawe loloa a laila ma lalo o ʻelua a ʻoi paha mau ʻēpē warp a pēlā aku, me kahi "ʻanuʻu" a i ʻole offset ma waena o nā lālani e hana i ka diagonal pattern.