Cut two 6 x 9 pieces of 100% cotton.
Cut 1 light weight iron on interfacing or stabilizer. Iron on front piece.
Cut two pieces of 1/4" elastic 7" long.
Add the elastic at each end. Sew the ends to anchor the elastic. Pull elastic inside.
Add backing. Pin all 5 sides but leave an opening for turning .. blue pins indicate that. Sew all around.
Turn right side out. Fold the main piece in half and mark center with pins. This will give you center point to make the 2 pleats. I sew ONLY the long ends. I do not sew, as yet, the ends because multiple stitchings make it difficult to sew down the pleats. One video I looked at shows 3 pleats but this caused a bulkier sew for my particular hand and finger issues.
Fold up each end to create two pleats on each end of the mask.
Sewn each end twice. Pins removed. This is the finished mask.
Pull up on each long end. This opens the mask. In this instances I used a little wider elastic. 1/4" elastic is best...but it is being told that because so so so many are making the masks, availability of elastic is in effect.