This pattern is for knit slippers, but I can totally see using a wool sweater and cutting and serging slippers from it! Home Slippers - DIY. this is knitting, but I bet I could use this to crochet some
Sock Knitting: Shadow Wrap Short-Rows Tutorial Daily love the color!
Wonderful 8 Knitted & Crochet Slipper Boots Free Patterns - The Perfect DIY