MakerMask

Fit (Beta)

MakerMask:Fit, a nonwoven polypropylene fitted face mask

MakerMask:Fit(BETA) Pattern and Instructions
Download Pattern Only
Download Care and Use Label

The ​MakerMask: Fit (Beta) ​is being developed as a fitted mask design. While we await feedback from the lab on optimal layering configurations, we would appreciate your feedback on the design. Please send comments on fit, sewability, and clarity of instructions to fit@makermask.org.  Refer to makermask.org/research for the most up-to-date information about NWPP as a water-resistant alternative to cotton, as well as for material substitutions and available testing data.

For experienced/advanced sewists. Consider testing with scrap material first.

Materials & Tools

  • 3 pieces of spunbond nonwoven polypropylene (NWPP) sourced from pre-washed shopping bags. Check for tag in bag indicating ‘100% Polypropylene’. If ironing use lowest possible setting and test on sample. Number of layers may be adapted to account for variable bag thickness and breathability. Chec​k our materials page for additional information.
  • 1 Nose Piece made from coffee tin ties or 3 pipe cleaners twisted together for rigidity. Common substitutions include paperclips or 16 gauge wire (verify suitability for boiling/autoclaving if using insulated or coated materials)
  • 2 Cloth Ties, each 48 – 58” long such as strips of cotton, bias tape, grosgrain ribbon or similar (materials should be latex-free and heat tolerant for disinfection/sterilization). Alternate: Silicone cooking ties may be used instead of elastics
  • Thread
  • Printed pattern (see final page of PDF download)
  • Sewing machine and extra needles (size 14 or 16)
  • Scissors, pins, etc.

Instructions

Step 1: Assemble Materials and Tools

Assemble materials and tools. Print out the mask pattern on Letter-sized (8.5″ x 11″) or A4 paper. Check that the measurements shown on the reference square of the printed page are accurate.

Step 2: Cut out Pattern and Materials.

Cut the pattern out. Use the pattern to cut three pieces of NWPP on the fold.

Caution: do not use pins in the body of the mask; pinholes may reduce mask functionality.

Step 3: Top-Stitch NWPP layers together.

Topstitch the 3 layers of NWPP to hold them together (1/8” from the edge all the way around).

Step 4: Sew darts (bilateral) for fit.

Make the darts on the inside of the mask as indicated on the pattern using your preferred technique (e.g. pin, fabric pencil, or chalk). Sew darts (bilaterally).

Note: Default dart size on pattern is for a ‘medium’; dart size can be adjusted to individualize fit. Warning: do not iron

Step 5: Sew ‘chin line’ from A to B (see pattern).

Fold along the fold line, with right sides together. (You want the outside of the mask on the inside when you sew the chin line.) Sew the chin line, starting from the fold (A) to the edge (B), see pattern.

Step 6: Attach ‘top strap’ to mask (inside, top)

Open the mask, and center the top strap on the inside top edge of the mask (so that the ‘right side’ of the strap is facing the inside edge of the mask). Sew the strap to the mask from one attachment point (C, left) to the other attachment point (C, right). Then, turn the mask over so that the outside of the mask is facing up.

Step 7: Create ‘nose piece’ for mask.

Twist three pipe-cleaners together to increase rigidity. Cut pipe-cleaners to length of mask to create the ‘nose piece’.

Note: In some cases, using half-length pipe cleaner centered at the nose may improve fit.

Step 8: Secure ‘nose piece’ to mask (outside, top).

Place nose piece on mask (outside, top). Fold top strap over nose piece, ensuring that it remains on top of the NWPP material. Top-stitch strap to the front of the mask to fully enclose the nose piece and secure it in place.

Step 9: Attach ‘bottom strap’.

Center the bottom strap on the mask (bottom, inside), as in Step 6. Fold material across the bottom edge to the outside of the mask and topstitch to secure from D (left) to D (right) to create a finished bottom edge.

Step 10: Finish straps.

Top-stitch the straps to finish (see images below).

 

Step 11: Disinfect/Sterilize before use.

Masks should be disinfected/sterilized before use. While autoclaving is ideal, home users can submerge masks in boiling water for 10 minutes for disinfection.

If you need assistance distributing your masks, we are partnering with the community to provide the best information as it becomes available. Check our website makermask.org for the latest information.

• Note: The FDA has released new guidance about labeling, manufacturing, and distributing face masks: FDA Face Mask Letter (April 24, 2020). We have created a Care and Use User Label for you to print and fill in to include with masks you make so that they can be compliant with the new FDA requirements.

Where do I donate my masks?

It’s really important that in our efforts to get masks delivered quickly, we also do it correctly. We are working with agencies to create a solid distribution network for the MakerMask project so we can provide clear direction on what to do with the masks you produce.

In the meantime, we ask that you work responsibly within your communities to get the masks to a group that can distribute them where need is greatest.

Please follow the guidelines below:

DO

Do verify that the healthcare providers and other front line workers want what you have to give.

Better yet, before you make, check with them, and make what they want.

Do include labeling information with all face masks.

DO NOT

DO NOT DROP OFF MASKS RANDOMLY at medical facilities. It does more harm than good.

DO NOT CALL AROUND TO HOSPITALS OFFERING MASKS.

Before you start, check with your local and social networks, as well as the resources below to find out what facilities and groups are asking for:

FAQ

Can I make the design out of two pieces sewn together rather than folded to maximize fabric use?
We prefer the folded design as it improves fit are reduces the number of seams in the center of the mask.
Can I use other materials for the nose piece?
Yes, we have seen coated paper clips and insulated copper wire used as well. Pay attention to the fact that the mask should be able to be boiled/washed and to the comfort of the nose. Make sure to materials used in labeling information.
Can I use other materials for the straps?
Yes, as long as they can be boiled and washed. If other materials are used, be sure to make note of them in all labeling information.
Can I just attach the straps instead of lining the top and bottom of the mask?
No, the straps along the top and bottom provide a better fit that the straps alone.
Can I use fewer/more layers?
Yes, as long as the mask remains breathable. Exercise caution as changes in the number of layers may impact the functionality of the mask. Increasing the number of layers used reduces mask breathability. Different sources of NWPP will have different weights (grams per square meter, or GSM) so adjust the layers to make sure you can breathe through them. Indicate any changes to layering and/or materials in all labeling information.
Can I use cotton for this pattern or for some of the layers?
Verify breathability of any/all mask layering combinations before use. Variations in design and materials may reduce breathability. Breathability testing of NWPP/cotton combinations is underway, but results are not yet available. If masks are breathable, using cotton layers for the part of the mask closest to the face should be fine. Think of this mask like a raincoat for your face. You want the water repellent parts on the outside (NWPP) and the comfy, soft parts on the inside (cotton). We do not recommend putting a layer of cotton in between two layers of NWPP as the cotton may not be able to be cleaned properly due to the water resistance of the NWPP. DO NOT USE VACUUM CLEANER BAGS AS FILTRATION LAYER. Indicate any additions or changes to layering in all labeling information.
Where can I find older versions of the pattern?
You can download Patterns & Instructions for all versions here.
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