I recently saw a video of this pattern. The originator is re-naming it ?Calf tail Caddis. .
It is tied by tying in some kip tail with the butt ends extending over the hook bend, and then doubling over the hair tips to the rear as well; then cutting.
He claims the calf tail hair floats better and longer than deer/elk hair. He omits the Hackle as he prefers the low riders, and floats well without it.
I just add a few sprigs of UV pearl ice dub.