I just stumbled across this same article this morning! Finally, something I actually do have on hand!
The article states: "They discovered that by adding
two blue shop towels and using a design that produces a tighter-fitting mask, they could make a mask that could block up to 95% of the particles they could test, while the cotton masks blocked 20% to 60% of the particles."
I've got 95% cotton/5% spandex masks with a filter pocket I am going to try this with. However, a big problem is that my masks don't fit tight over the bridge of my nose; consequently, my glasses fog up. DH and I have been trying to solve this. I've seen patterns with instructions to hot glue twist ties or pipe cleaners to the top of the mask. Think I'll start with pipe cleaners.
And sort of related to masks: DH has a collection of safety goggles from his pre-retirement days. Now that experts are warning us to protect our eyes as well as our nose and mouth, I'll be adding a pair of goggles to round out my lovely facial get-up, lol! Maybe the people wearing bags over their heads had the right idea to start with!