Deadly Caddis Pupae
It's a fantastic emerging caddis imitation. Cast it across, let it swing downstream with the current, or hang it under a dry fly. This fly can be Deadly during an evening or daytime caddies hatch. It is an under-utilised fly you can fish as you walk downstream. All caddies must, at some point, hatch. Stay focused on using just Mayflies; Caddis feature big time in a trout diet. Get swinging, feel the whack of that trout. Hopefully, it's a biggie!
Remember, Having more than one good fly and the right size is always good. So, the more significant the pack, the better; that way, you will have a few staple flies doubled and trebled up in the pack selection.
As we know, there's nothing worse than losing the only fly you have that works.