1. Step A-1.Fold the main fabric into halve with the wrong side facing each other, pin the paper pattern onto the double-layered fabric. Cut the fa...

2. Step A-2.Repeat the same as the main fabric, except the ear side seam allowance. Cut the fabric at the ear side with zero seam allowance.

3. Step A-3.Turn the face mask main piece with the right side facing each other and sew the face mask's centerline.

4. Step A-4.Clip curve along with the seam allowance; be careful and don’t accidentally clip on the stitches.

5. Step A-5.Press seam allowance to one side, topstitch near to the seam line on the side where the seam allowance is.

6. Step A-6.Repeat the sewing on the lining part.

7. Add step C-7 to C-11 if you want to add nose wire to the face mask.

8. Step A-7.Flip the lining and place onto the main face mask, align the center seam line, pin and sew the top and bottom lines.

9. Step A-8.Turn the face mask right side out. Press seam neatly and topstitch near the edge.

10. Step A-9.This is how it looks like from the inside at this stage. The main fabric of the side ear area is longer than the lining piece. This is...