Mount hook, post a small clump of white calf hair at the 70% mark. Thread dam in front, 8-10 wraps up the base.
Tie in split light dun tails at the bend.
Dub a slender PMD-yellow body to the post. Thin noodle, gentle taper.
Wrap a light dun hackle 3-4 turns down the post, parachute style. Tie off beneath.
Whip finish at the head.
Substitutions
Body instead of PMD yellow dubbing: Pale yellow Superfine — Standard match; Sulphur yellow dubbing — Slightly warmer; Pale olive Superfine — Early season PMDs often have olive tint
Post instead of White calf hair: Hi-vis orange poly yarn — Much easier to see in riffles; White poly yarn — Easier to work with than calf