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12 Sets (288 hours) of Replacement Electrospun Nanotechnology Filters
12 Sets (288 hours) of Replacement Electrospun Nanotechnology Filters

Was 6 sets, now 12!

12 Sets (288 hours) of Replacement Electrospun Nanotechnology Filters


*IMPORTANT: Please be sure to MATCH Filter Size dropdown below with Masks you are purchasing or have purchased in the past.

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12 Sets (288 hours) of Replacement Electrospun Nanotechnology Filters. (12 right & 12 left) in each bag.

Each single use filter set (1 right & 1 left) is usable for up to 24 hours of use. Filters cannot get wet, be washed, or be reused, so please remove and discard filters every time you wash your mask. Reusing filters causes reduced filter efficiency, loss of mask breathability and can cause bacterial infections if they are overused. This is the case for any mask filter or meltblown/surgical mask on the market! We always recommend that you replace filters immediately after air travel, attending a high-risk event, or any time you feel exposed. For filter instructions please see our video here.

Each mask filter contains an excess of 15 miles of nanofiber matrix (thousands of times smaller than a human hair) in an area less than 1mm thick! They are invisible to the naked eye and can protect with 99% efficiency all the way down to nano aerosols as small as 0.1 microns. 

Note: our non-woven polymers are made sustainably at low temperatures in New Zealand, and are inert and non-toxic. We do NOT use antibacterial additives, graphene, carbon, activated charcoal, silvadur, or woven heavy metal nano particles such as copper, silver or zinc common in many surgical and filtered cloth masks. Our 15 miles of nanofiber matrix is sandwiched between two layers of polypropylene (one on each filter side), so there is no chance of fiber shedding or breathing in fine nano particles. Our materials were designed for kids, seniors and those with respiratory conditions and chemical sensitivities. 

These filters are shaped and designed specifically for the Unicorn Mask, and we therefore do not recommend inserting them into different mask brands, as it will drastically reduce the efficiency rating!

  • Kids size options to fit your Unicorn mask:
  • Kids Small: Ages 2-3
  • Kids Medium: Ages 4-5
  • 45-75 Lbs will be Adult Small

  • Adult size options to fit your Unicorn mask:
  • Small: 45-75 Lbs, 20-34 Kg
  • Medium: 75-130 Lbs, 34-59 Kg
  • Large: 130-190 Lbs, 59-86 Kg
  • X-Large: 190+ Lbs, 86+ Kg

Featuring proprietary New Zealand SETA® electrospun nanotechnology

99% Efficiency blocking particles at 0.1 microns (Coronavirus ≈ 0.125 microns)

Filters are not washable. Mask sold separately.

*Unicorn masks are ASTM F3502 face barrier coverings, and not considered medical masks or respirators.

"As a biomedical engineer scientist with focused research on nanotechnology for regenerative and translational medicine, I endorse the use of nanotechnology utilized by Unicorn Breathing Mask, specifically with the use of electrospinning nanofiber polymers to filter out particulates down to the 0.1 um dimension. This is crucial when providing effective filters for a breathable face mask as a barrier towards viruses like that of the coronavirus. This mask is capable of protecting one from viral particulates exposure due to its robust electrospun nanofiber innovation and recommended 3-ply construction."


Based on 223 reviews

Have also found these useful while cycling. Provide warmth against winter winds as well as protection against dust while farmers are harvedting.

Fantastic mask

Love the fit-better than any other mask I have tried. Very comfortable. Love the many layers of fabric and filters. Breathing is excellent compared to N95s. Will always wear and keep a supply on hand.

Feels protective

This mask is best fit I have found…and I have tried quite a few!

Only negative is the filters are a little fiddly to get in.

Great fit!

Just like the first Unicorn mask I purchased, this one fits like a glove. No fogged glasses and difficulty breathing. I almost forget I'm wearing it.

XL Sport

Great product. Works well, comfortable, efficient and durable


The masks are comfy to wear, and I love the unicorn design. Getting the filters into the mask is somewhat of a challenge.

This mask is very comfortable

This mask is very comfortable & I feel safe and protected by it.

fabulous masks

These are the best masks we' ve used in the last two years. Perfect fit, easy to replace filters and fit perfectly into a pocket or purse.

Great as always

Excellent overall design and comfort. Have worn these on planes and other crowded places. So far, so good! (I’m also backed and boosted; you need it all) Now have 15 for a family of 3, seems like the right amount

Only Unicorn Breathing Masks for Me!

I have been using only Unicorn Breathing masks throughout the pandemic. I have many of the styles and this is my 7th mask. It is very comfortable. The bottom line is, I am 75 years old and I have not been sick at all in the past 1 1/2 years. I attribute this to precautions I have taken which include using my Unicorn Breathing masks.

So good ordered a second one

Loved the first one so much that I ordered a second one for my wife! The fit is very good for a reusable mask, the nose clip is starting to show some wear in it of not as stiff but still functional, the chin cover is also showing some wear but is still functional. I feel comfortable wearing it and washing it and changing the filters is simple.

Despite the two cloth layers + filter it is no more difficult to breathe through than a surgical mask - which I wear all day at work. The under the chin portion makes the mask more secure than others. Overall I feel extremely safe wearing this mask.


Finally, a mask that fits my face and provides both comfort and protection. I love being able to order different sizes for various family members. They're easy to put on, comfortable, don't fog my glasses and dry overnight when I wash them. Perfect!

Great fit and comfort

It has been difficult to find a mask that fits well, breathable while offering good protection, and is comfortable. These masks are fabulous. Although a little pricey, you are getting great quality.


These masks are wonderful. I have converted three families to only use these masks. They are easy to clean, and once you get used to putting the filters in it takes no time at all. We use them in all types of weather and the fit is great. My children have no issues with their ears and no gaps

Form & Function

This is the only mask I’ll wear! It’s beautiful, so comfortable and works great! My family and I went to Universal Studios and didn’t get Covid. The masks were breathable even in 80 degree heat. I highly recommend them!


Comfortable but a little pricey. Met my expectations. Would recommend.

We love them

My kids love these masks- they are easy to breathe through. Most importantly, they fit extremely well and do not bother your ears during a long day. I love the ASTM certification. The only thing I wish was different is the ability to replace the bar across the nose when it eventually wears out and breaks.

Fits well

This mask fits me quite well! It took a bit of time to adjust the nose wire so it wouldn't fog up my glasses, but that's to be expected. Like that the stiffness of the mask keeps it from touching my mouth.

Looks great

As far as masks go, this one looks great on my husband. We feel good about the 3-ply and it is very comfortable.

good protection, well-made

I'd purchased one previously, and at first had more difficulty breathing, but then I realized I was comparing to the more porous cloth masks. Now that I am used to this, and 3 layer masks with filters, this is not a problem. Especially with case numbers so high, I wear this new one (blue hemp) and previous one (linen) exclusively when going out. It is nice knowing the mask/filter has been so well researched and designed for top protection in all the details, and with attention to sustainability. Originally I found the filters hard to insert, but now seem to have the knack and this really isn't a problem. Plus they're attractive, not flashy but fine, and in fact have had strangers comment on it and ask where to get one!


LOVE my Unicorn mask! Fits very well, Easy to put on, Easy to breathe through

Great maxes

It doesn’t get hot, you can breathe very well. Comfortable. Love that way I have bought 5. Thanks so much for making this great maxes.

Looks Great!

Honestly haven’t used them yet, saving them for my travels for my upcoming honeymoon. But they feel soft and look cool and the filters look good. Thank you!

A breath of fresh air - literally!

I have bought Unicorn masks for a handful of loved ones and I have recommended your masks to all that I know. Your masks stand above and beyond the others. We love our masks, they are great quality and fit. We feel confident and comfortable.Thank you very much for your very thoughtful and protective masks! It’s a breath of fresh air literally! Just make sure to check the sizing tab for best fit.

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