Flex hackle is made with a combination of Mirror Flash and Spandex, bettter known as Flexi Floss or Dyna Floss. This one sided hackle shakes, quivers, and breaths like nothing else. Add a simple collar to poppers, steelhead and saltwater patterns. Entirely made in the U.S. with U.S. materials. Available in two different widths, 3/4" and 1 1/4". Each package contains 4 1/2 feet per package.