What it is
UV2 Roe Yarn is a UV-fluorescent yarn meant to imitate eggs and add bright trigger points. It has a chenille-like, fuzzy texture that builds a round profile quickly and holds up well on the hook, with strong fluorescing for high visibility.
What to tie with it
Use it to form full egg fly bodies by tying in a short section and building the shape with tight wraps or a short “ball” of material, then locking it down and trimming to round it out. It also works as a hotspot tag, collar, or short thorax accent on nymphs and streamers where you want a concentrated fluorescent hit without adding much bulk elsewhere.
Flies and the fish they're for
This yarn is built for egg patterns, which are a staple for trout and steelhead in rivers during spawn and post-spawn periods. As a hotspot accent on nymphs, it’s commonly fished for trout in tailwaters and freestones when you need something the fish can pick out fast in broken or off-color water. As a hotspot on streamers, it’s a trigger detail for trout and, in bigger water, species like smallmouth that will key on a bright target point.
How it compares
It behaves more like a chenille-style material than a traditional smooth yarn, so you can create a dense, egg-shaped body with fewer wraps and get a more textured, durable finish. Traditional yarns tend to look softer and more “threadlike,” but don’t build that same quick, fuzzy, rounded profile.
