Here is some of the better resources I have found on cloth masks thus far:

One with elastic:

  • Elastic from old fitted bedsheets can be used in no elastic can be found

One with straps:

Some posts mentioned needing a bendable noseband, but I’m not sure how practical that may be for what we have.

Here is the comparison article of breathability and filtration efficiency of different materials that I was talking about:

  What Are The Best Materials for Making DIY Masks? – Smart Air Filters

As a last resort, DIY masks provide more protection than nothing. Researchers tested household materials. Here’s which captured the most particles.

Which comes from this research paper by Cambridge researchers way back in 2013: