Polar Bear, and Artic Fox is the preferred wing material in traditional steelhead flies. You can just substitute for the calf tail.

I would recommend it be used only on the smaller flies, as it is quite a bit softer, and I did not like the action on bigger flies.
_________________________
Give a man a fish, and you'll feed him for a day; give him a religion, and he'll starve to death while praying for a fish.