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.
Yarn: Malabrigo Worsted skeins) Needles: US 8 Pattern: Cast on 30 sts. Row 1 (WS): Slip 1 pwise, purl to end. Row Slip 1 kwise, *YO, pass YO over repeat from * Repeat these two rows until desired length ending with a purl row.