The Tag Thread is designed to create fluorescent tags. The color covers a limited area of the rig—on the back of the body, for example—and the material also reacts to UV light.
Another advantage when using it on a vise is its untwisted structure. The strand can be split for a small hook or used as a double strand when the tag needs to be fuller. The thickness of the detail can thus be adjusted without changing the type of line, across the various available colors.