*"Based on this comparison, it is reasonable to consider China KN95, AS/NZ P2, Korea 1st Class, and Japan DS2 FFRs as “equivalent” to US NIOSH N95 and European FFP2 respirators, for filtering non-oil-based particles such as those resulting from wildfires, PM 2.5 air pollution, volcanic eruptions, or bioaerosols (e.g. viruses)."
How often should I change my mask?
These are single use so that cross contamination is avoided. The mask can be worn for up to 8 hours. If the mask gets damp then it is recommended that you replace it.
Why have 3 pleats on a 3-ply mask?
The pleats reduce the risk of fluid penetration by preventing fluids pooling on the mask. They also make the masks more comfortable.
What is the main difference between medical masks?
The main difference between masks is their certification level. Generally higher levels of certification standards require masks to offer higher protection and take into account the wearer's environment. For example you would not need a surgical respirator type KN95 mask in an open environment, KN95 masks are intended for healthcare staff working in high risk Covid-19 clinical applications or where the highest level of protection is required.