Spirit River UV2 Turkey Flats- Turkey flats or T Flats are a very under rated material. It works best as a winging material and parachute posts. The UV2 process makes it a much better representation for mayfly wings just like the real ones have a lot of natural UVR. I love it as parachute posts because it is much lighter that calf tail. I also like it as a caddis wing laid out over the body. Particularly useful on tiny midge flies. Ties in clean and small. Spirit River continues to lead the way in UV2 technology. They have used a double dye process to give all our unique UV2 materials and flies the added UVF/UVR ultraviolet wave lengths. We all know UV Florescence which is so common on everything from street signs to bass lures. UV Reflectence is a spectrum of wave lengths humans can not perceive yet is extremely common in the animal and insect world. UVR allows mayflies to find mates, and bees to find flowers. Many male birds and bugs have a strong natural UVR signature. Available in white. Made in America.