At one point in time I was making kitty beds out of recycled wool sweaters (There's a Goodwill outlet in town - they sell everything left over by the pound....). I was finding the largest sizes I could and was washing them in hot water to shrink and felt them a bit. I kept two and my kitties love them, but I broke my sewing machine doing it and lost the impetus.... I still have some sweaters. I should start back up again.