This takes a long time because the lengths of yarn you use are very short. I spit-spliced all the yarn scraps together to make the yarn first in order to avoid weaving in all those ends and that probably took longer than weaving in the ends would have, so it was definitely an undertaking. I used my multicolored yarn ball (made of scraps of everything I had that was wool or mostly wool) held double with a fingering weight merino in light grey, can’t remember the brand. Despite the time, I adore this sweater, it’s so much fun.