It's basically a needle felted flower design that is built on the shapes from the wool coat, lined with the sleeve lining. That is some winter up-cycling!
Step 1: Needs
You also need some wool roving, for the needle felting!
And a needle-felting needle. I got mine at Joann's super store, as a "refill", but I just hold the single needle as is.
Traditionally, you use a foam block for the "table" under your needle felting but I just used a wash cloth, folded.
You may like a type of liner for the neck because the wool may be abrasive. If you do it like I did, this won't be a problem. :)
You can hand-sew or machine sew your liner so that it won't unfold. (I machine sewed with a darning foot.)
Also, a needle and thread for the button and flower attachment.