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21/4/2020, · The 0.4-0.5mm thick canvas material ranked as being easier to breathe through than a surgical ,mask,, while still performing fairly well at filtering particles. But if thick fabrics aren’t available to you, the study’s data showed that 100% ,cotton, T-shirts, layered up, are also still effective options for homemade ,masks,. (More on this below.)
27/4/2020, · In fact, the researchers say that this combination performed close to that of an N95 ,mask, material. If you don't have any ,polyester,-spandex chiffon to hand, then substituting this fabric with natural silk or flannel, or a ,cotton, quilt with ,cotton,-,polyester, batting, was found to produce similar results.
Another study suggests that you can increase the effectiveness of a multi-layer ,mask, by combining one layer of ,cotton, with a different material. Researchers evaluated the filtering efficiency of ,masks, made from one layer of 600-thread-count ,cotton, and either two layers of natural silk or chiffon (in this case, a 90% ,polyester,–10% Spandex weave) or a single layer of flannel (a 65% ,cotton,–35 ...
"Hybrid" ,masks, are the safest homemade option. In a recent paper that hasn't yet been peer-reviewed, researchers in the UK determined that "hybrid" ,masks, – combining two layers of 600-thread-count ,cotton, with another material like silk, chiffon, or flannel – filtered more than 80 percent of small particles (less than 300 nanometres) and more than 90 percent of larger particles (bigger than ...