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
How to knit woven stitch with wool and the gang. ROW 1 (RIGHT Slip your first Insert your right needle into the back of the second stitch on the left Wrap the yarn and pull the stitch through as for a regular knit stitch.