There is no mystery to this gorgeous wrap, just a simple twist. You work it as a rectangle, then create a Möbius strip by rotating one end 180 degrees before joining it to the other end. Also has video on Tunisian Crochet hook and stitches
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.