What it is
Hareline Veevus Power Thread is a 140 denier fly tying thread built for strength. It cinches down hard without getting ropey, and it will lay flat on the shank when you spin your bobbin and manage your wraps. That flat profile helps you keep a smooth underbody even when you’re leaning on it.
What to tie with it
This is a good choice when you’re tying larger patterns where you want to pull materials tight and not worry about snapping thread, like big dries and chunky terrestrials. It’s commonly used on stoneflies, larger caddis dries, and hoppers, and it also works as a floss substitute when you want a clean, wrapped body instead of a bulky thread base. Because it lays flat, you can build smooth bodies and neat heads without a lot of extra bulk.
Flies and the fish they're for
Stonefly and hopper patterns tied with this kind of strong, flat thread are staples for trout on freestone rivers and tailwaters, where those bigger meals are a normal part of the drift. Big caddis dry patterns built on heavier hooks are also trout flies, especially in rivers where adult caddis bring fish up and you need a durable tie that holds its shape after a few eats. When you use it as a floss substitute for a smooth body, you’re still in that same world of trout fishing—clean-bodied dries and larger nymph-style builds where a tough thread and a tidy profile matter.
How it compares
It can stand in for floss when you want a smooth, wrapped body but would rather just build it with thread than switch materials. The difference is that you’re getting a durable thread body instead of the distinct look and handling of true floss.
