Cut out the pattern pieces on fabric.
Cut two pieces of elastic 5” long.
For Mask WITH filter opening, Sew the small side panel to the inner facing piece aligning the small dots.
Sew the panels together leaving a gap unstitched between the two dots.
Press the seam open with an iron and edge stitch the filter opening to hold seam allowance in place.
Next, align the inner facing pieces and outer mask pieces with RIGHT sides together and sew along the curve with a ¼” seam allowance.
Sew the ends of the elastics to the sides (on the RIGHT side of the fabric) forming loops.
Align the two layers (inner facing with filter opening and outer fask pieces) with RIGHT sides together and stitch all around the perimeter with a ¼” seam allowance.
Turn the mask inside out through the filter opening and press seams flat with an iron.
Edgestitch around the perimeter.
For Mask WITHOUT filter opening, align the inner facing pieces and outer mask pieces with RIGHT sides together and sew along the curve with a ¼” seam allowance.
Sew the ends of the elastics to the sides (on the RIGHT side of the fabric) forming loops.
Align the two layers (inner facing with filter opening and outer fask pieces) with RIGHT sides and stitch all around the perimeter with a ¼” seam allowance leaving a 3” gap.
Turn the mask inside out through the 3” gap and press seams flat with an iron.
Edgestitch around the perimeter and stitch the opening closed to finish.