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.
This is the stitch I wanted to show you guys. If you're interested, you just need an afghan hook. Tunisian Crochet Basics - Crochet Tutorials - Knitting Crochet Sewing Embroidery Crafts Patterns and Ideas!