Sure - After my Team worked on a number of different types of masks and used different types of plastic/vinyl with our sewing machines...we came up with this better mask.
For the window - use the plastic paper sleeves that we all use for school. They come in different weights. The best types are the medium weight since the heavy weight is too much for the sewing machine to go through and the thin is too flimsy for the mask after washing them. You can cut them with your scissors without harm into the sizes appropriate for this pattern that I have attached. See attached file.
This is the video that goes with this pattern:

There is no captioning or words. You will need to watch the video a number of time to get the feel for how to make the mask but after a few times and reading through the written pattern - you will get the hang of how we are making the Clear Windowed mask. One of my pictures - the ironing board one - shows how they look. [This one is fewer steps than the previous one which was 6 pages long!] Eloise