Photos do not do this fiber justice. It is so shiny and fiery. Hence the name Firestar Blending Nylon Fiber! While it can be spun alone, it is most often blended with wool or other fibers for strength, such as in sock heels and toes. It can be carded to blend, or spun and plied with another strand of wool, etc.
Also popular for fly tying, so we’ve been told. The fish like the sparkle as much as the rest of us, I guess.