https://www.youtube.com/watch?v=sh_OZPEfP5E
The Rusty RS2 a take on Rim Chung's famous pattern. The main element shared with the original RS2 is the wing style.
It is not a tough tie, but it has proved to be a good pattern for trout feeding on baetis emerging nymphs.
This has been very effective in small sizes 20-24.