- Open the mask to expose the interior of the filter valve.
- According to the OPEN directions on the valve, turn the valve counter(clockwise), to separate the valve.
- Remove the filter.
- Replace the new filter, reverse the above steps, clockwise rotation of the valve, over.
SKYSPER Amazon's store：
Quantity: as pictures 1
We are so sorry that we only can send parcel to America, for logistics reasons.
Our Dust Mask Link: https://www.skysper.com/collections/mask