June 22 Update: We are now selling cotton/silk masks guided by this study as well as 2-layer high-thread-count cotton masks. Visit the Masks section of our shop.
A recent study testing the effectiveness of cloth masks made with a variety of fabrics found that adding 2 layers of natural silk, 2 layers of 90% poly/10% spandex chiffon or one layer of 65% cotton/35% poly flannel to a high thread count cotton mask resulted in protection that is only “slightly inferior to the N95 mask above 300 nm, but superior for particles smaller than 300 nm.”
In order to help you estimate the fit you want, we list our model's measurements and the size she is wearing below each photo or under "Specs" on the product page.
Note: "Hip" = Lower hip/largest point of hip
XX-LARGE / 2X