The flap has a zipper closure and a magnetic snap to hold it down.
There is a zippered pocket on the back...
... but unfortunately, I somehow managed to mess up when following the instructions, and the pocket is sewn shut, which I didn't notice until the bag was all finished. Grrr!! (Actually, it's "haha" by now. Better to laugh at yourself than growl, right?) I thought I was following the instructions correctly, but when using patterns with diagrams - as this one was - it's harder to tell what's going on. I much prefer patterns with actual photos of the sewing process. I'm still not sure exactly where I went wrong, but I'd better figure it out, because I have another one cut out!
Next up (tomorrow?)... one more project for Quilt Market!