The spirals formed by twisting may extend upward to the left (the S-twist) or to the right (the z-twist).
Cordage is of the 2-ply z-twist type with each single S-twisted.
This sewing element, which serves as the weft, consists of 2-ply z-twist cord with a medium-to-hard twist.
Single-ply S-twist warps crossed by single-ply S-twist and z-twist wefts (1 fine-texture specimen).
The cord on these specimens is invariably of the common 2-ply z-twist agave fiber.