Recipe:
Hook - #10 1XL Nymph hook of your choice
Thread - 6/0 UniThread color of your choice (black used in the above picture)
Bead - your choice brass or glass bead
Body - tan dubbing, dubbed heavily and brushed out (can be reinforced with wire ribbing for extra durability)
Hackle - soft hackle feather of your choice ( I prefer hen pheasant, India hen, or grouse)

The bushy tan body seems to be the trigger, since the pattern continues to catch trout even after the hackle has been destroyed. Works with a retrieve and also beneath an indicator. I sometimes also add a tail of turkey... Looks good and works....but doesn't seem necessary.