I continue to maintain my perfect record of NEVER felting anything that will fit my feet. sigh These are the Striped Slipper Socks from Knit One Felt One by Kathleen Taylor done in Cascade 220. I made the largest size, then put them in the washing machine in a hot water wash. I took them out and they'd only felted slightly. The pattern says it should take two washes. During the second wash they felted so much as to only fit a small child.