Well some have heard about it I hadn't.
The trick is you use WOMENS NYLONS as the thread. Unravel / tear a few threads depends on the size of the fly. Color to match, Black is always good.
You can start and stop at any time without having to keep tension on the fly. The nylon keeps every thing in place as you go and you tie the fly as normal.
And the best part is there are no knots. When you get done. Just several wraps for the head as any other fly then a small amount of cement or what ever to keep in place.
I haven't fished any tied like this yet,but i'm being told it's stronger and more durable then thread. The person that gave the presentation is from Bosnia and this is how he learned.
Just think your best fly is coming apart on the stream. A few wraps of nylons and your back in business.
Don't get me wrong it will take a bit of practice but it was interesting to do.
If I knew how to attach a photo I would show you my frist try at it. It's fishable.