MIT "Smiling" Masks (with nose clip + material recs): https://co-mask.github.io/

Face Shield: https://www.delve.com/assets/documents/OPEN-SOURCE-FACE-SHIELD-DRAWING-v1.PDF

NYT How-To Mask Guide: https://www.nytimes.com/article/how-to-make-face-mask-coronavirus.html

CDC Mask Guide: https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/diy-cloth-face-coverings.html