Nano Silk 20D 24/0

Possibly the worlds strongest fly tying silk for its diameter. The Nano Silk Ultra is ideal for flies sizes 18 and smaller. And you can still split it down further or use it to tie dubbing loops. 24/0 (20 denier) use with ceramic bobbins. 

Pro Tips:
1 - rotate anti-clockwise to untwist and lay perfectly flat. With just 2 or 3 light wraps of Nano Silk over foam you can then tighten and tie in foams or materials that would cut easily.
2 - use white Nano Silk and simply color the last 4 inches (100mm) of thread for heads in a visible color

Not all GSP threads are the same as strength tests show. We use the highest quality materials to ensure that there are no tangles and that it produces the smoothest and strongest GSP on the market in each size band. Search for Global Fly Fisher Thread Chart to see independent evidence!.

There are 100m / 109 yards (approx.) per spool of Nano Silk 200 Denier 3/0 Big Game White.