Textreme AC Flat Chenille 20 mm is a variant of the Cactus chenille, featuring flat-stitched fibers spaced further apart, for a tidy effect and controlled volume during winding. Its thin core facilitates assembly, while the arrangement of the fibers ensures less invasive filling, particularly during palmering. With a diameter of 20 mm, it is ideally suited to medium-sized flies, offering bright, even fly tying.