I bought a wool sweater at a second hand store. It had some damage from being washed improperly; the round yoke was shrunken and fulled a bit. I washed it in the machine with hot wash/cold rinse, then put it in the dryer. This procedure made the sweater very dense. I cut out bits of the sweater and sewed them into this hat. The brim is one piece; it was knitted that way. It is floppy when worn, and I love it.
Next time I need to take pictures of the garment before I begin cutting.