The non-medical V4 Mask is a two-layer mask similar to our V3 Mask (3 layers) in that it's a good option for people who want to sing, talk, open their mouths wide to laugh or who have facial hair or beards. Most (but not all) people will find they can open their mouths really wide without this mask slipping off the nose or above the chin. It features soft & comfortable adjustable ear loops and a lanyard for convenient wear.

The new nose bridge in the Flannel V4 Mask design is seamless and sits at a slight recess behind the rest of the mask; this design may work better for folks who’ve found it difficult to find a cloth mask that prevents their glasses from fogging.

The Flannel V4 Mask is made with two layers of 100% Cotton Flannel that’s OEKO-TEX Certified. If you’re wondering why we’ve chosen flannel (no, it’s not because we’re based in Seattle!) here’s the scoop:

We were honored to play a very small role in a recently published research study: Filtration Efficiencies of Nanoscale Aerosol by Cloth Mask Materials Used to Slow the Spread of SARS-CoV-2 published in ACS Nano. As you can read in the acknowledgements of the study, our small role was to send fabric samples to the researchers for testing.

As mask designers, we continually look forward to further research investigating potential mask materials. There’s always more we can learn; scientists and researchers are working overtime on behalf of their communities, countries, and the world on various projects related to COVID-19 and our collective human response to this pandemic.

We've worked with a fabric mill on a 100% Cotton Flannel fabric for our V4 Reusable Cloth Face Masks; the design of this fabric is intended to have a chaotic web of fibers, which could create more surfaces with which aerosolized particles could interact, as indicated as a possibility in the study. Our 100% Cotton Flannel is produced in an OEKO-TEX Certified fabric mill. Please note that this is not a medical grade fabric. Click here for the exact specifications of our 100% Cotton Flannel Fabric.

Like our bags, our masks are satisfaction guaranteed; we welcome you to emailus@tombihn.com whether you love your mask and want to recognize our talented sewing crew or there's something not working for you.

Our innovative ear loop and neck lanyard material is comfortable, conforming, and stretchy — but it’s not the scratchy elastic that’s typically found on masks. Even when worn around the ears, we (and others) find our material to be quite comfortable for longterm wear. As we mentioned, the ear loops and neck lanyard are both adjustable; you can shorten or lengthen them. We find the neck lanyard to be a convenient feature when we go out for walks. If no other people are around, we can let the mask hang around our neck and against the sternum; if we see another person coming our way, it's easy to very quickly grasp the ear loops (without touching the fabric of the mask) and put the mask on.

Your mask will arrive with a metal nose piece inserted into the slot that can be bent to conform your mask over your nose. By leaving the nose bridge slot open on both ends, we’re giving you the option of customizing the nose bridge to work best for you — you can replace the included metal piece with a different nose bridge material if you’d like a softer or firmer fit.

To wash your mask, see the CDC: How To Wash Cloth Face Coverings guidelines. We also recommend washing your face masks in a reusable mesh laundry bag; this will prevent the ear loops from getting caught on other stuff in the washer and dryer and will help protect your mask. If you’re looking to avoid wrinkles, machine wash your masks, shape the mask, and line dry per CDC Guidelines. Removing the twist-tie piece (use a pair of tweezers to pull or push it out) will help the nose piece last longer. Please download and review this PDF for our full warnings & instructions for use.

INSTRUCTIONS FOR USE, SIZING, SHIPPING OPTIONS & MORE
Choosing the right size of mask
Returns & Guarantee
Made in U.S.A. (and what that means)
100% Cotton Flannel Fabric Specifications
Warnings and Instructions For Use

CHOOSING THE RIGHT SIZE OF MASK
 

To determine which size you need, take a flat ruler and place it next to your nose. Measure from the bridge of your nose to the point of your chin.

Choose Small/Medium if you measure LESS than 4.5” / 115mm

Choose Medium/Large if you measure MORE than 4.5” / 115mm

And if you measure exactly 4.5" or have facial hair, we recommend choosing the Medium/Large size. The ability to adjust the fit of the mask also means that some folks may be able to make a larger size than normal work for them. For example, the best size mask for for a person whose face measures 4.25” is the Small/Medium, but they can likely wear a Medium/Large with a good secure fit by tightening her ear loops.

RETURNS & GUARANTEE
Our masks are satisfaction guaranteed. Please emailus@tombihn.com if you're happy with your mask *or* there's something that doesn't work for you. We want to hear from you!

For the health and safety of our crew, we can’t accept physical returns, repairs or exchanges for/of these masks. Any issue with materials or workmanship on these masks will be evident immediately; beyond your immediate inspection of the mask upon its arrival, the mask is not covered under our Lifetime Guarantee.

100% COTTON FLANNEL FABRIC SPECIFICATIONS
 

Yarn size in cotton count:

Warp: 20/1 (20 singles)

Weft: 46 doubles (92 individual threads)

Weight:

In raw/loom state : 6.2oz per square yd

In finished state : 5.6oz per square yd

Brushing:

Face side : 10 passes

Back side : 5 passes

Dyestuff:

Reactive

Dye method:

Continuous

Residual Shrinkage:

Max. 5% under Gentle Cycle and Tumble dry low

WARNINGS AND INSTRUCTIONS FOR USE
We recommend that you read our Warnings & Instructions For Use. If you need more copies of the Warnings and Instructions For Use to distribute with masks that you are providing to others, please download this PDF and print additional copies on your home printer.

These guidelines are based on this FDA document; the guidelines may be subject to change. Please refer to the FDA website for the most up-to-date information.

Enclosed Face Masks are NOT Intended to Provide Liquid Barrier Protection.

This mask is not a surgical device or a respirator and should not be used as a substitute for either of these devices.

Not for use in any surgical setting or where significant exposure to liquid, bodily or other hazardous fluids, may be expected.

Not for use in a clinical setting where the infection risk level through inhalation exposure is high.

Not for use in the presence of high intensity heat source or flammable gas.

100% Cotton Flannel. Note: These masks are not made of medical grade material.

For adult use only. Wash these masks according to CDC washing guidelines prior to first wear. Wash routinely depending on the frequency of use. Do not microwave. Do not put in the oven.

Use of this mask is intended to be an addition to and not in substitution of all other measures recommended for the prevention of communicable diseases.

If irritation occurs, discontinue use.

If unsure, consult your personal physician before wearing.

When washed and dried, secure the clean mask to your face to cover both your nose and mouth.

WARNING: Gaps between the mask and your face, or a loose fitting mask, will reduce the effectiveness of the mask. Once secured, refrain from touching the mask and your face in order to adjust its fit. Any hand contact with your face, or the mask itself once donned, can increase your risk of contracting or communicating an infectious disease.