I tie the tails and the abdomen of fly on a right hook.
Tie a foam strip near the abdomen.
I keep a slot of polypropylene yarn placed under the hook shank and tie it between the foam strip and the shank of the hook.
Tie a rooster hackle on the hook.
I do a dubbing
I tie the chest of fly with dubbing, then wrap the hackle under the foam strip, tie it on hook and cut excess.
Tie the head of fly.
Cut the excesses of two foam strips.
I lift the two part of yarn and cut the excesses.
Fly front view
Fly view from below