kf94.au is a Perth-based supplier of Good Manner KF94 masks. We started after hearing the same three complaints from friends and family: masks that didn’t fit, sellers who vanished after taking the money, and no way to tell a genuine KF94 from a counterfeit.
So we do the opposite. We carry one brand, from one approved Korean manufacturer, and we publish the paperwork behind it.
What KF94 actually means
KF is Korea’s filtration grading for masks. Korea’s Ministry of Food and Drug Safety approves each product in this category individually, rather than letting manufacturers self-declare against a standard.
94 is the minimum filtration efficiency the grade requires: 94%. It is measured against two test aerosols, sodium chloride and paraffin oil. The paraffin oil aerosol has a mean particle size of about 0.4 microns.
Korea has regulated particulate masks for decades, because of the seasonal dust that blows across the peninsula each spring. The grades existed long before anyone outside Korea had heard of them.
What the testing shows
Good Manner KF94 (Large White) was tested by KOTITI Testing & Research Institute in Korea against the MFDS guideline. Filtration measured 99–100% against sodium chloride and 98–99% against paraffin oil, where the grade requires 94%. Inhalation resistance measured 8–9 Pa against a 70 Pa limit, which is a measure of how hard the mask is to breathe through. Read the full report (PDF), or see our FAQ for the complete results and their scope.
Why we chose Good Manner
We tried eight KF94 brands before settling on this one. What made the difference:
- Very low breathing resistance. This is the one we’d point to first, because it is measured rather than an opinion, and it is what you notice by mid-afternoon.
- Soft elastic earloops that don’t catch in hair.
- Two sizes, so you can pick the one that sits closest to your face.
- A three-panel fold that opens into a shaped cup and holds room in front of the mouth.
- Plain colours that don’t fight with what you’re wearing.
Two things we won’t tell you. No mask fits every face, which is why we sell two sizes and tell you how to check the fit. And these will not stop your glasses fogging for everyone — the nose panel is breathable and the nose piece is plastic rather than a mouldable metal wire. We go through both honestly in our FAQ, including when to buy something else instead.
Independently tested too
In testing commissioned by CBC Marketplace and published in April 2021, three samples of the Good Manner KF94 (black) tested at the University of Toronto’s Dalla Lana School of Public Health recorded filtration efficiencies of 99.2%, 99.6% and 99.9%. CBC tested 14 KN95 and KF94 brands bought at retail; half did not meet their stated filtration standard.
Those samples were bought in Canada in early 2021 and predate later changes to the product’s approved materials and manufacturing method, so we cite it as independent corroboration rather than as testing of current stock. CBC and the University of Toronto tested the mask. They did not endorse or rank it.
Who buys from us
Individual customers, and retail stockists including convenience stores, pharmacies and gift shops.
On the bulk side, most of our volume goes to workplaces dealing with dust: construction sites, mining operations, trades, workshops and warehouses. We also supply offices, schools, salons and beauty studios, events and conferences, and sales and real estate teams who want something neutral-looking to keep in the car.
Bulk orders
We hold stock in Perth and ship Australia-wide. For bulk pricing, get in touch with the quantity and sizes you need and we’ll come back to you with a price and a lead time.