Fly Materials Deer Hair - Natural Material: Carefully selected from high-quality whitetail deer or mule deer hides, and tanned to be soft. Characteristics: The hollow structure of the hair provides high buoyancy, making it suitable for creating dry flies that float on the water's surface. Uses: Used for the heads of streamers like the Muddler Minnow, wings and bodies of dry flies such as Caddis and Hoppers, and bass bugs. Thank you.