We used dyed Merino wool roving. I added a little gray curl of Cotswold wool from my own sheep on each of my slippers; you can just see it near the cuff in the first picture.
This footwear is seamless. We applied and felted wool on both sides of the pattern, creating both slippers simultaneously. When the felt was firm enough, we cut apart the two slippers and pulled the pattern out of each.
