I’ve created filter pouch pockets/openings numerous ways but have decided to share the quickest and easiest method with those of you trying this at home. I have tried to make this as simple as possible. Thus, part 2 does not require any sewing and only uses minimal materials.

Materials You Will Need:

  • Leftover scraps of fabric (same colors you used in PART 1)
  • Iron-on adhesive sheets (Heat’n Bond)
  • Plain blank sheet of white paper 8.5″ x 11″
  • Replaceable filters (to use once your face mask is complete)

Tools You Will Need:

  • Scissors
  • Iron
  • Ironing board or table

Step 1: Cutting a Filter Opening

You can cut a filter opening after you have completed HOW TO SEW A FACE MASK (USING A SEWING MACHINE): PART 1 OF 2 or after completing “Step 6: Creating the Nose Bridge.”

Turn your mask with so the outward-facing portion is facing down. Use scissors to cut a straight vertical line approximately 2 inches long on the right or left side of your face mask, about 1-2 cm away from where your elastic will be placed (or where your elastic already is). See the photo below for how this will look.

Step 2: Measuring & Cutting Fabric Rectangles

Use scraps of fabric from PART 1 of this project. Cut fabric into small rectangles approximately 2-2.5″ in length x 1″ in width. Cut out an equal size of iron-on adhesive sheet.

On an ironing board or table, place the exterior-facing part of the fabric down on the ironing board. On top of the fabric rectangle, place your equal sized iron-on adhesive sheet, with the adhesive portion facing down. Iron on a low or medium setting heat until the two pieces are affixed to one another. It is advisable to iron on top of a sheet of plain blank paper (8.5″ x 11″), just in case not all of the adhesive sticks to the fabric (and you don’t want adhesive stuck to your ironing board or ironing blanket top). These rectangles should look like the ones below.

Step 3: Choosing & Shaping Your Iron-on Rectangles

Pick rectangles that are similar in size with one another and that have an equal or longer length than the opening you cut in the back of your face mask. If they are not exact fits or are fraying, you can easily cut them to the right size and cut off any fraying edges now.

After cutting them to equal sizes and the correct length for the pocket opening, you can test to check if they properly fit (prior to peeling the sticker back). When you’ve finally cut it down to the appropriate sized rectangle, peel off the sheet you ironed on, extremely carefully, without accidentally peeling off the thin layer of adhesive.

Once you’ve done this, turn the rectangle on its back with the adhesive side facing upwards (see below).

Step 4: Ironing

Once you’ve completed step 3 (as shown above), fold the inserted rectangle in half (in the same direction as the portion already tucked away). In this case, you will be folding to the right side, towards the scissors. Once you’ve folded your rectangle evenly in half, iron over it just enough to make sure the pieces are properly affixed. Repeat the same sequence of steps on the other side.

Once you’ve finished affixing both rectangles, the inside-facing portion of your face mask should look like the image above.

Ready for a Filter

After you’ve completed all the steps above (and in PART 1), your face mask pocket/opening is ready to insert a removable filter.

If you use your face mask very frequently, change out the filter roughly every 4 hours or so. If you only use it on occasion, you will not need to change your filter as frequently. The type of filters you use with your mask is up to you. I have been using PM 2.5 filters. Research and check the CDC website to find the material and/or filter that will best match your needs.

Taking Care of Your Mask

Wash your face mask by hand in warm water and gentle detergent and air dry. Alternatively, spray rubbing alcohol on both sides and let the face mask dry over night (this will not clean it as well as washing it but it is better than reusing your mask without any type of cleaning.


Your face mask is complete! It is not guaranteed to completely prevent the transmission of COVID-19 and/or other airborne viruses. This face mask is NOT approved by the CDC. Nor am I a medical doctor, medical professional, or an individual who has the authority to make claims or guarantees regarding the prevention of transmission of disease(s).

During these times, it’s suggested you cover your mouth/face when breathing and going into public places, particularly if you will be in close proximity with other individuals. Wash your hands frequently. Don’t touch your face when you’re outside. Try your best to keep at least a six-foot social distance from others.

If you have any questions regarding how to make this mask, please don’t be afraid to contact us by email:

Thank you!