This is what I do to make the most fabulous warm, snuggly and practical winter parker.
I buy a soft secondhand blanket... ideally NZ or Aussie merino wool. It wants good drape and hand (texture or "feel").
Holes in the blanket are fine, just darn with wool, and if moths are suspected, bung it in the freezer for 14 days or so to kill any potential eggs.
Then I choose a parker pattern I like. My favourite is the Landgate Parker by Merchant and Mills. It has a hood, a fairly snug neck with zipper and inserted gusset, and optional pockets and waist drawstring (neither of which I use).
I especially like this pattern because it keeps my neck warm and has a hood, which is really cute when lined with a different fabric.
I SIZE UP, because the blanket liner will add bulk.
Then I construct it in three layers, the top layer which I overlock to the blanket layer, and a thin
lawn liner layer for ease in getting in and out of the garment, and extra comfort.
Inserting the liner is a bit of a pain if you are not used to it, but worth it, and you learn a cool new skill for making clothing more comfortable.
Yup, it is the snuggest thing I possess.
I use the same technique to make winter house overalls. Again, fabulously snuggly, comfortable and keep your tum all covered and warm. You don't have to use a blanket for these, tho you can. I use straight NZ merino yardage, buying "seconds" to make it cheaper.
Re the cloak, you will never be able to wash it. It will attract dirt like a magnet and snag like a mad thing. But look pretty for several wears, and use a LOT of expensive carded wool. Yup..... cool but not practical.
Sigh.... I want to attach an image, but no luck. Hugshugs, Janette