Viral Filtration Results
The 3MD 5-micron masks and community masks were evaluated in viral filtration studies by the world-famous Nelson Labs in Utah. 3MD’s mask samples were pre-washed and dried twice prior to the initial study. The results are attached below. Our mask with the 5 micron felt filter showed a viral filtration efficiency (VFE) of 93.6% and our community mask had a VFE of 81%. By comparison, a regular 2-layer cloth mask had a VFE of only 61%. Both masks provide greater protection than a standard cloth mask.
The key for our results is as follows:
Update: 3MD’s 5-micron mask was recently retested by Nelson Labs after washing for a cumulative total of 920 minutes (15.3 hours) in a high-efficiency washing machine with warm water. It showed high durability by maintaining a viral filtration efficiency of 91.7%.