While I was sewing felted wool mittens and dog coats, I collected bags of wool fabric/garments from relatives and thrift stores. When I decided to stop making them, I had to find a good use for the wool. I separated any of the fabric/garments into two piles fabric that had felted (and become thicker) and that hadn't.
Anything that had felted I donated to a non-profit that makes mittens for charity. I had several large garbage bags of wool. They were thrilled to receive them.
Anything that hadn't felted I cut into 12" strips. Then I sewed the strips together to make large wool blankets. I serged all the seams and the edging of the blankets. I had enough for eleven blankets. I also made nylon straps so they could be rolled in 'bed rolls'. Everyone got them for Christmas that year.