Mask #3 is made out of HEPA vacuum bags which filter out 99.97% germs which is more filtration than an actual N95 mask. This is the Safest mask out of the 3 masks because of the filtration and its difficulty is at the medium level.
This is the type of vacuum bag that is the specific bag that is used for this protective mask
Materials: each materials list is different for each example so use the materials list that is specific to the video you are using!
This video can be used to make this mask and is very helpful taking you step by step throughout the entire process
Video #1: