STEP 1) Match each set of 2 matching fabric pieces inside out and sew along the curved edge of each pair
STEP 2) Match the nose seam of your cotton pair up to the inside of the seam on your canvas pair. Open both pairs together and sew along the top and bottom edges
STEP 3) Flip the sandwich/tube right side out and iron flat (Yes, we know ironing sucks, but we promise it’s important this time)
STEP 4) Tuck the loose end inside itself - insert one end of your elastic piece and sew over it until secure. Tuck the other end of the same elastic into the seam before finishing.
Repeat on the other side with your second piece of elastic.
STEP 5) With Both ear loops installed and the mask right side out - sew once more around the edges. This important “cover stitch” will help your mask hold its shape in the washer/dryer
(Pro tip - for an extra secure cover stitch, you can use a zigzag stitch. If you’re a beginner, sticking to your straight stitch settings works fine too!)