MEO™ Kids Helix™ Filter Pack of 3 contains three replaceable filters for your MEO™ Kids mask. 5 key elements: Filtration – MEO™ Helix™ Filter Media provides superior electrostatic performance, capturing over 98% of PM 0.1 particles and filtering out more than 99.99% of airborne bacteria. Breathability – we have the world’s most breathable filter media, allowing the wearer to receive a steady stream of purified air because it takes less energy to draw air through the filter. Standards – AS/NZS 1716:2012 . Fitting – Perfect size in order to match your MEO™ Kids mask. Ease – Very easy to be replaced and disposed.