The new improved version of this tutorial (with the elastics and the insertion of a nose clip) is available here.

This mask was created using the pattern provided by AFNOR (French Standardization Association) here :
www.afnor.org.

I added an opening at the bottom to have a possibility to insert a filter, just like if it was a pillowcase. Second difference is in the attachment system, which allows to fix the mask using only one knot.

Unlike the mask with the central stitch, this model is less fitted and as a result a little less classy. But having sewed, worn and offered both, I finally find this one more comfortable in the long run: it's a bit like a difference between wearing a tight pencil skirt and a cotton hippie dress =) And since once outside it's better to not to touch the mask, I find this model more versatile: you can laugh, talk and even scream without having to adjust it.

Good sewing,
Ania.

1. Preparing the pattern
Prepare your pattern: a square 20 by 20 cm (8 x 8 inches), with the marks for future folds.
The pleat steps: 25 mm – 25 mm – 25 mm – 50 mm – 25 mm – 25 mm – 25 mm

(in inches it looks like this: 1 – 1 – 1 – 2 – 1 – 1 – 1)
1-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
2. Preparing the fabric
Important: Preferably use tightly woven cotton fabrics. Cotton percale, as here inside the mask, seems to me to be a very suitable fabric.

Wash, dry and cut your fabric, adding a little margin for sewing.
I've added an extra 2 cm on the bottom of the outer square to make the flap (which will turn our mask into a miniature pillowcase =)
3-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
3. Straps
If you have elastic: prepare two strips of 35 cm each.
Otherwise, to make fabric straps, cut a strip of fabric 3 cm wide and at least 1 metre long (1 x 40 inches)
2-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
4. Stitching the perimeter of the mask
Make the hems on one side of each piece of fabric.
Fold the flap (excess of the outer square) to the right side of the fabric, then assemble the two squares obtained right against right.
Make a perimeter stitching on the other three sides, as if you were making a pillowcase.
4-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
Turn your mask inside out, taking care to properly turn out the corners and iron it (never underestimate the importance of ironing in sewing =)
5-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
5. Pleats Reporting
Once ironed, transfer the pleats from your pattern to the mask.
6-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
Secure the pleats before proceeding to the final stitching. It looks tricky, but in fact it is not (on the picture, the pink fabric is on the outside, the chocolate fabric is on the inside of the mask).
7-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
6. Final stitching
Stitch on all three sides. I made triple stitch on the pleat lines to avoid excess tension on one thread.

If you have elastics (I envy you! =), just attach them to the sides.
Otherwise, cut your 1 meter strip of fabric into 4 pieces. The first two will be used to tie around your ears, the other two to make a nice tie around the back of your head.
9-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
7. Creating fabric straps
Attach the two strips on each side of the mask to obtain the ear loops.
They will be too loose to hold on their own, this is ok. We'll attach the two remaining strips (a slip knot is enough) to make the pretty ties.
Thanks to this system, there is only one knot to make to put the mask on. Even better, it adapts more easily to any morphology and can be tightened at the desired level of the back of the head.
10-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
8. Filter
Place your filter inside while wearing your mask (here I used a simple paper towel). Don't forget to throw it away carefully before washing your mask.
And most importantly, wash your mask after each use.
11-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
Do not forget to wash your mask if it is a gift for someone ♥
12-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial
Tuto | New Improved Version
Nouvelle version avec élastiques et pince-nez
The new improved version of this tutorial (with the elastics and the insertion of a nose clip) is available here.
10-le-chale-bleu-mask-with-filter-pocket-sewing-tutorial-NEW-VERSION
have a good sewing!
Take care of yourself and you loved ones, and don't hesitate to share this page with your sewing friends.
Don't hesitate to write to me if you have any questions or ideas on how to improve this pattern (or my translation of this text. Sorry if there are mistakes, I did my best). You can also find me on Instagram @lechalebleu, I will be happy to discuss with you about masks, shawls, scarves or just nice weather =)
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