Antron or Zelon (trailing shuck) Amber/gold antron or zelon (1 sparse tuft)
Dry-fly dubbing (body) Olive, tan, or gray to match hatch (small pinch)
Deer hair (wing) Natural deer hair (1 small clump)
How to tie it
Start thread and run a base to the bend.
Tie in a sparse tuft of amber Antron or Zelon as a trailing shuck no longer than half the shank. This is the empty pupal husk the emerging caddis is climbing out of.
Dub a slightly tapered body forward to the 80% mark; keep it thin, half the dubbing you think.
Stack a clump of natural deer hair and tie it in as a down-wing reaching just past the bend, tips even.
Lift the butts and trim them square over the eye, Elk Hair Caddis style, to form a short flared head.