Cordage fibers are materials used to make rope, twine, and other forms of string. The crossword solutions for this term include istle (5 letters), istles (6 letters), pitas (5 letters), and sisals (6 letters). Istle is a type of fiber obtained from the leaves of the agave plant, while istles are a type of fiber obtained from the leaves of the yucca plant. Pitas are a type of fiber obtained from the leaves of the pineapple plant, and sisals are a type of fiber obtained from the leaves of the agave plant. All of these fibers are commonly used in the production of rope, twine, and other forms of cordage.