My Hepa filters finally arrived. They are vacuum bags that I cut into 3.5 x 4.5 inch pieces.
There are 3 thin layers so I put a tiny amount of glue in the corners to secure the pieces together.
After wearing it all day today in my pocket mask, I really like it, Thinner and lighter feeling than the double layer tea towel. Was not harder to breath. It is more flexible. Hepa filter is not washable though. Remember to remove it and let it air our for 24 hours after use. Wash mask separately.
People who win a mask will get both filters to try for themselves. Would appreciate your comparison in the feed back especially in regards to comfort.