Gentlemen, this may help...
I added a removable coyote ruff to my single layer Ventile coat and it's worked out very well. I called Bill Worb in Winnipeg to buy the fur. Explained the project to him and told him the length of the ruff I needed. http://www.billworbfurs.com/
He sewed up a length of fur using nice, long winter grade coyote. (You want winter grade). The direction of the fur pieces he put together all go in one direction as you can see. The longest hairs come from the the hide that runs atop the animal's spine. I recommend dealing with Bill â he's a nice guy and knows fur. His catalogue is amazing.
I put 6 snaps around the edge of the jacket hood. Then I sewed together this brown cordura "collar" with a wire frame along the leading edge. The wire is inserted into a channel I sewed into the front of collar â makes it much, much easier to mold the ruff around your face. Having the wire in there is really important in my opinion. This collar snaps to the hood.
I used leather needles (they're triangular shaped) to sew the fur to the collar. Bill Worb also sells these. The fur wraps around the collar so the hairs point out, and away from your face. You'll need to order a little more fur then you need, then cut then fur to length with a razor blade. Cut it from the hide side, breaking through using gentle strokes so you don't lose too many hairs in the process. Slowly and carefully pull the pieces apart.
Here's the final ruff. Sewed the collar itself with a machine. Sewed the fur to the collar by hand because you have to constantly brush away the hairs from your seam when you insert the needle.
Now you just snap the collar on to your hood.