CPAP Filter Mod for Montana Mask
thingiverse
This is a modification or accessory for the Montana Mask. You can find the mask at makethemasks.com. Finding material for the filters has been a challenge. Some people are cutting apart surgical masks, because you can make up to 9 filters out of a single mask. Unfortunately I have no surgical masks, but I do have HEPA filters for a CPAP machine. These parts are designed to adapt those filters for use in the Montana Mask facemask. You'll want to print one of the Filter Frame, and two of the Filter Mounts. Place the CPAP filter over the filter mount and pop it into the frame. Then pop the frame into the Montana Mask.
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