Troutline Sumo Tying Thread is an ultra-strong fly tying thread designed for tiers who need maximum strength with very low bulk. Made from high density multi-filament polyethylene, it offers outstanding breaking strength while keeping a very fine diameter. This makes it an excellent choice for small flies, thin bodies, and precise modern fly patterns.
Sumo thread is easy to split, easy to flatten on the hook shank, and very practical for advanced tying techniques. Its slightly twisted structure allows easy unraveling for split-thread work, while the smooth and slightly shiny surface also makes it easy to wax or color with a permanent marker.
It is especially useful when tying small dry flies, nymphs, wet flies, and even slim streamers where body control and thread strength are both important. One of its main advantages is that it helps you build neat, slim bodies without adding unnecessary volume, even on very small hooks.
Technical details:
- Standard spool
- 50 m per spool
- 30 DEN
- 18/0
- Breaking strength:
- Black – 1010 g
- White – 900 g
- High density multi-filament polyethylene
- Slightly twisted
- Easy to split
- Easy to unravel
- Lays flat on the hook shank
For dubbing bodies, we recommend using tying wax for better grip, or using the split-thread technique for clean and durable results.
