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Key Features
K-Filters:
- The Nanofibre K-Filter has a filtration rating of 99.6%* - effective for 200 hours before filter needs replacing.
- The K-Mask and K-Filters can be baked in the oven at 60 degrees, during their 200 hour period to kill all trapped bacteria and viruses, offering added security.
- The K-Filter is made from biocompatible hydrophobic material which is elastic and electrostatic, meaning they are highly breathable and flexible, and will not become wet with water vapour from breathing. This also reduces the carbon dioxide re-breathing occurrence.
- The K-Filters can be cut to size without damaging the technology, allowing you as a customer to either use it in your Infrared K-Mask or any other mask you own.
Description
Available individually or in 5 packs, 17% discount on 5 pack cost.
Using a triple sandwich layer, nanofibre combination, the K-Filters have been designed as a re-usable, world class filter that will protect you and those around you.
Layer 1: Nanofibres capture viruses, bacteria and pollutants via electrostatic attraction.
Layer 2: Activated carbon layer for environmental pollutants.
Layer 3: Nanofibres capture viruses, bacteria and pollutants via electrostatic attraction.
The filters have been independently tested to ASTM F2100, ASTM FT101 and EN 1486 standards, certifying the 99.6% filtration rating*. The K-Filter offer its protection for 200 hours and for particles as small as 0.03 microns. The effectiveness of the filtration level is due to this microscopic level of protection offered by the electrospun nanofibres, that ionically attract the particles before trapping them within the filter layers. To contextualise this, the Covid-19 virus has a particle micron size of 0.06-0.5 and bacteria has a particle size of 0.3 microns. Healthcare workers on the front line have so far been using N95 rated masks that have a particulate protection size of 0.3 microns; so the wearer can feel confident in their protection when using the K-Filter.
The nanofibres within the K-Filter are made from biocompatible hydrophobic material which are elastic and electrostatic, meaning they are highly breathable, flexible and will not become wet with water vapour from breathing. This also reduces the carbon dioxide re-breathing occurrence that is a problem among even medical grade respirators.
The K-Filters can be cut to size without damaging the technology, allowing you as a customer to either use it in your Infrared K-Mask or any other mask you own.
This is why the KYMIRA K-Filter has proven itself to be one of the most effective air filters in the world.
Best Use
Wear the K-Filter in the K-Mask for a perfect fit, or add the filter to any other mask with a filter pocket included.
Wear your mask with K-Filter whenever you are in public, or in large groups of people - to protect yourself, and those around you.
Change the filter for a fresh K-Filter replacement at least every 200 hours, for continued 99.6%* protection from viruses, bacteria and environmental pollutants.
The K-Masks and K-Filters can be baked in the oven at 60 degrees, and this will ensure that all trapped virus and bacteria particles are killed.
Fabric & Care
The Nanofibre K-Filter offers the wearer 200 hours of viral, bacterial and pollutant filtration protection. Once this time period is completed, the filter can be replaced with a fresh filter, and the protection will continue.
The K-Masks and K-Filters can also be cleaned and reused during this 200 hour period. The masks and filters can be baked in the oven at 60 degrees centigrade and this will ensure that all trapped virus and bacteria particles are killed.
Reviews
SHIPPING + RETURNS
THE RATHER IMPORTANT BITS
This rather lovely piece ships directly from our brand partner - we work with independent brands who are absolutely brilliant and work frightfully hard to create beautiful things.
SHIPPING DESTINATIONS
Now, here's the thing - our wonderful brand partners ship to lots of different places, but not all of them can ship worldwide.
Some are brilliant at international shipping, others prefer to keep things closer to home.
At checkout, you'll see exactly where this particular brand can send your goodies.
We're terribly sorry, but shipping costs do vary rather wildly depending on where you are in the world. The exact figures pop up at checkout - no nasty surprises!
RETURNS
You have 14 days to return items.
Now, we absolutely adore our brand partners - they work incredibly hard and we do try to support them as much as we possibly can. So I'm rather afraid we have to pass the return postage costs back to you. Frightfully sorry about that!
🌍 PLEASE CHOOSE THOUGHTFULLY:
Our wonderful partners put their hearts into everything they make.
Ordering multiple sizes to try at home is rather hard on our planet and makes things jolly difficult for these brilliant independent creators.
When in doubt, do ask us first!
The brands we work with all have a chat option, and they love to chat!
PAYMENT
We're frightfully modern and accept all the usual suspects:
Visa, Mastercard, American Express, PayPal, Apple Pay, Google Pay, and Shop Pay
SECURE AS HOUSES
Everything's properly encrypted and secure - your details are safer than the Crown Jewels!
All prices in lovely British pounds £ GBP, though international chaps will see converted prices.
Any payment pickle? We're here to help sort things out! Contact us
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Sostter began, as all good ideas do, with a lively conversation and a shared sense of frustration. Why had the world of independent design become so serious, so samey, so… beige? Where was the spark, the imagination, the sheer joy of discovering something that made you stop and stare?
We dreamt of a marketplace that celebrated difference — where curious minds could explore a world of independent brands, design-led makers, and thoughtful artisans. A space that felt exciting, human, and beautifully imperfect.
Today, Sostter brings together remarkable people and their creations — from London to Lausanne, Brooklyn to Berlin — uniting makers and discoverers through craftsmanship, creativity, and conscience. Every object tells a story, and every purchase supports an independent brand doing things differently.
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