"Using this sensor, the researchers analyzed the fit of surgical masks on male and female subjects, and found that overall, the masks fit women’s faces much less closely than they fit men’s faces. "

This was a very interesting takeaway for me, and seems a subtle example of how industrial design is often designed for men's forms in a subtle way. As there are different schemas or types of masks it would be curious as a follow up to know which kinds better fit feminine features overall