These baskets are of coil stitched construction, which is the most difficult type of basket weaving. Coil stitching produces a tightly woven basket with thick walls. This process requires skill and experience to keep the inner coil at the right thickness while stitching the outer wrap over the coil with a needle. These baskets are made from papyrus stalks on the inside of the coils and palm leaves around the outside. Some Nubian baskets also use wild grasses.