I sent the finished seamless slippers to my sister-in-law.
Several people have asked me about the soles. I found some “replacement carpet” for cars and trucks at Wal-Mart several years ago (2003 perhaps) when we put some new carpet in Mr. Aitch’s truck. It was easy to cut and hand sew so I tried it on the bottom of the slippers. The texture is similar to a thick felt though this is polyester. It’s good but does wear out. I bought a roll for under $10 (can’t remember the brand name) just for this purpose but I haven’t seen it at our local store for a few years. Layers of denim/old jeans, canvas or wool quilted together or even leather will also work as soles.