Here is the fly pattern sheet for the SLS Soft Hackle Emerger.
TMC 3769 or Dai Riki 710, #14
Pearsall’s silk – orange or gold
SLS Zelon dubbing
Hungarian Partridge dyed orange or yellow or Golden Plover
Here is a video from Blue Ribbon Flies:
Imitates the Heptagenia mayfly found in the waters of Slough, Lamar, and Soda Butte in the NE corner of Yellowstone Park during August and September.