If you want to add a filter, you will put it in the center first.
Then fold the long sides in toward the middle. You will be covering up the filter if you added it in the first step.
Fold the long ends again overlapping them slightly.
I have two options for ties for this one. Note that I am NOT using the hair ties as elastic around the ears. I find that extremely uncomfortable. Instead, take one ribbon and lay it on the bandanna as shown with a loop in the center at the top.
Or you can lay two shorter strings as shown.
Then fold the short ends towards the middle over the top of your ribbon(s).
Tuck the ends into each other to complete the mask. This is where this one is adjustable. You can put it in a lot or just a little. You can also glue this shut IF you do not add a filter that needs to be changed.
To wear, loop the top ribbon around your head or tie in a bow if it is two ribbons and put on top of your head. Pull the bottom ribbons around your neck and tie in to place. You have a face mask and it just took you about 5 minutes!