A different way to assemble knitted / crocheted slippers. Much the same way a shoemaker would when cutting leather pieces for shoes. Sides worked straight, toe worked with short rows, sole added at the last
Genius slipper design where you knit a short "scarf", fold and sew onto your bottom. Garter stitch extra chunky yarn about wide, and however many rows you need, then sew into the 2 layers of the felt bottom.