Home Made Mask
First thing to do is fold your fabric rectangle right sides together and sew along the top edge. Leave 2 Inch opening in the center of the seam to create the opening for the inner pocket.
Turn the fabrics of the seam is centered in the middle of one side if you want you can press the seam open and stitch down the sides of the scene for a neater edge.
Next sandwich the elastic pieces between the 2 layers of fabric pin one end of the elastic to the top and the other end to the bottom the sides of the fabric rectangle. If you can't find elastic you could also use for fabric ties each one will be about 18 Inch long and you will sew one tie in each of the 4 corners be careful not to catch the ties or the elastic pieces in the side seams when you sew them. sew the sides of the base mask you can back stitch over the elastic or the fabric ties to secure them clip the corners of the mask with scissors and press it with an iron then turn the mask right side out you can use a pencil to help you push up the corners.
Now it's time to make the pleats mark the mask with 3 evenly spaced lines. Fold the fabric to create half inch pleats and use pins to hold them in place. Make sure all the pleats are facing the same direction. The last step is to sew down the sides securing the blades in place.