Airtight waterproof hearing aid dryer (or, really, for any other small items)

Step 5 Finish top edges

Now you'll want to finish the edge by enclosing the raw top edge of the fabric inside the fold. To do this, unfold the fold you just made, and then fold the top edge of the fabric down again, only a half inch this time, so the raw edge of the fabric lines up with the inside of the crease that you just ironed. Iron that new fold that you just made. Now fold the edge over again on your original fold line, so that the raw edge of the fabric is enclosed in the fold. (The images help to illustrate this process. It's simpler than it sounds.)