Although I use KN95 in crowded settings, the silk masks are great for exercising or when it's warm. They wash well and dry in no time so they are great for travel. The colors on this one are especially nice. We've been using these, as well as Ellsworth linen masks, since early in the pandemic and like them. The only negative is that the pocket that holds the filter allows it to slip down a bit low so I'm less likely to be breathing through the filter. Hence, the choice to use other masks in crowded settings.
Thank you, Ellsworth, for making a quality alternative.