MEO™ Helix Filter Pack of 3 (Karen Walker Collection)


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MEOTM Lite Filter (Helix Filter)

  • Weight:45g
  • Inside box:MEO™ Lite Helix Filter Pack of 3
  • Standard:AS/NZS 1716:2012
  • Size:one size fits all
  • Material:Wool
  • Type:MEO™ Karen Walker collection replaceable filter
  • Recommended filter life: 14 days / filter
SKU: N/A Categories: ,

What Is In The Box

3x MEO™ Helix Filters

Its many advantages include

  • Superior electrostatic performance for capturing particles.
  • Removes noxious gases.
  • Inhibits growth of bacteria.
  • Made from a renewable resource.
  • Hypoallergenic


MEO™ natural filter uses scientifically selected wool from sheep specially breed in Wanaka, New Zealand.


To find your MEO™ size, measure the circumference from your chin to the back of your neck.

S : 365-425mm
M : 425-480mm
L : 480-545mm

Reminder: If you are between two sizes:

  • Please choose the bigger size if you want the best breathability
  • Please choose the smaller size if you want a snug fit


AS/NZS 1716:2012
The filter element submitted is able to capture 97% of particles, at a pressure drop of 35 Pa. This means that the Large element size reaches a P2 pass rating

Microbial Cleanliness (Bioburden) of Medical Masks according to EN 14683
There is a very low level of aerobic bacteria and fungi found on the the mask, so the mask can be considered “clean” when it is made.

MEM Elution / Cytotoxicity
The test result is a pass. A score of 2 means some materials in the mask still cause cell death, but not enough to be be considered damaging. This means the mask is considered non-cytotoxic.

Latex Particle Filtration Efficiency (PFE) according to ASTM F2299
The filter is able to capture 99.85% of 0.1 um particles created when tested at that flow rate.

Bacterial Filtration Efficiency (PFE) according to ASTM F2101
The filter is able to capture 99.99902% of 3 um Staph bacteria created when tested at that flow rate.


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