The foam adds a bit of buoyancy to John Barr’s fly.
hook - WFC Model 3 #10
thread - Uni 6/0 black
tail - elk hair
rib - tying thread
body - Ice Dub tan
wing - Congo Hair white
hackle - grizzly/ginger
head/overbody - 1mm foam tan
Used a brown version here
To catch a few of these
Regards,
Scott