- Unique Helix Filter medium with 99.99 % filtration efficiency with low inhale/exhale resistance.
- Replacement filters available separately .
- Made in New Zealand
S: distance from ear to ear ~ 310 mm
M: distance from ear to ear = 290mm – 350mm
L: distance from ear to ear = 350mm – 410mm
Filter efficiency nelson labs 954158-S01 Amendment 1 (Latex Particle Challenge Final Report)
MEO MASK Test report AS NZS 1716 HB (Respiratory Protective Devices).PDF
NELSON LAB_FinalReport (Cytotoxicity).pdf
Product Catalogue only (KW, twin pack).pdf
Product Catalogue Helix filter, Karen Walker Series..pdf