These flies are designed for upstream dead drift use, and are reckoned by those that have used them to be more effective than standard spider dressings except for faster water where stewarts style is often as effective if not more effective.
The hackle for the bunch wing is soft game hackle, the most effective being Waterhen Coverts and Partridge Hackles.
Soft Wing - March Brown
Yellow silk, lightly dubbed with a hares ear mixture which looks tan, but mix light medium and dark hair to achieve this. Fine copper wire rib, ( use lacquered wire for this, or it turns green quickly when wetted). Tie in a sparse bunch wing of brown partridge fibres from a brown coloured brown partridge hackle. Dub some darker hare fur on the thread, wind around the hook at the back and front of the wing. finish the fly and velcro the dubbing at the sides and below.
Soft Wing - Greenwells
Dress a "greenwell", with waxed yellow silk ( turns to olive),and fine gold wire rib but dont put any hackle on it. Tie in your sparse bunch wing of waterhen fibres, ( or you can o this first if you want before you make the body).You can use any of the dark blue/brown fibres but they should be soft fibres, not stiff fibres from the wing feathers. I don't split it. Just an upright bunch. Now dub a little bit of dark hare's ear on your thread. Wind this around the hook at the base of the wing, a little in front and a little behind, so that is basically looks like a small lump at the wing base. Finish the fly, and then scrub the dubbing below and at the sides of the hook for legs.
Dark Watchett - Softwing
Hares Lug and Plover - Softwing