Our 5-layers PM2.5 filter Protection sheet:
Non-Woven + Melt-blown Cloth + Activated Carbon + Melt-blown Cloth + Non-Woven
You can use them continuously for 12-16 hours or around 1 week of occasional use.
Dear Bloom Diary's customer, we only carry adult size filter for now after taking in few feed back from the mothers. They prefer to use adult filter for kid mask, although is a bit difficult to slot in, as it covers the whole mask and provides better protection for their kids... So we have decided to only bring in adult size filter for now.
However feel free to let us know via firstname.lastname@example.org if you still prefer child size filter we can then specially order for you and it will take a round 2 weeks to reach.