The wrap cast on method, which is sometimes called a loop or thumb cast on, lets you add new stitches to your knitting needle quickly and easily. It creates a stretchy edge when starting your knitting project, but it also works well for adding more stitches along the way. Another name for this method of casting on stitches is the e-wrap cast on. That's because each new stitch starts with a wrapped loop that looks like a lower case e. It's helpful to remember that as you form the stitches so you know that you're making them correctly.