To create a patola sari, both the warp and weft threads are wrapped to resist the dye according to the desired pattern of the final woven fabric. This tying is repeated for each colour that is to be included in the finished cloth. The technique of dyeing the warp and weft before weaving is called double ikat. The bundles of thread are strategically knotted before dyeing. Patola saris from Surat, Ahmedabad and Patan are renowned for their colourful diversity and geometrical style.