Step 1
Cut two of each shape. Take two larger rectangle pieces and place them on top of each other, with the curved edge on one end and the straight edge on the other.

Step 2
Place pins around the curved edge so your fabric doesn’t move, and sew just around the curve. Taking the pins out as you go.

Step 3
Place your piece off to the side and repeat Steps 1 and 2 for the smaller rectangle pieces.

Step 4
Grab both rectangle pieces and unfold them so they are now open with the seam (or the curved edge you just sew together) in the middle and the straight edge on the corners.

Step 5
Place your smaller rectangle on top of your larger rectangle, making sure your seams are aligned.

Step 6
Place pins around the outer edge of the top of the mask. Sew together, removing the pins as you go.

Step 7
Place pins on the bottom of the mask, making sure the edges match up and sew together.

Step 8
Fold the outer straight edge of the larger rectangle over the smaller rectangle, overlapping it just a tad.

Step 9
Place pins on the overlap and sew together. Again, removing the pins as you go.

Step 10
Repeat Steps 8 and 9 on the other side of the mask.

Step 11
Place your mask aside and grab a clothespin and pin it to the end of your elastic, or your material that has some stretch/give to it.

Step 12
Shift your material through the overlap on the sides you just created, making sure your clothespin goes first.

Step 13
Now take your material through the opposite side of the mask, on the end you just came from on the other side.

Step 14
Take the two ends of your elastic/material, overlap them, then sew together.  

*Make sure to use ¼” seam allowance while sewing.