Okay, I know as someone who can work on a sewing machine, this should be easy for you. Follow these steps:

This mask is more difficult to make, but it may feel more comfortable and last longer.

What You’ll Need:

• Two 10- by 6-inch rectangles of tightly woven cotton fabric. (You could use sheets or quilting fabric, and a T-shirt will work if nothing else is available.)
• Two 6-inch pieces of elastic (or rubber bands, hair ties, string, or cloth strips)
• A sewing machine
• Needle and thread

How to Assemble It:

1. Stack the two rectangles of fabric.
2. Fold the longer, 10-inch sides 1/4 inch down and sew them together.
3. Fold the shorter, 6-inch sides 1/2 inch over and sew at the edge, leaving a small space open for the elastic to loop in.
4. Thread the elastic through the opening you left in step 3. Tie or sew the ends together.
5. Tuck the knots inside the opening. Gather the short sides together and stitch the elastic into place.