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Cretonne and mixed chintz fabrics, Burlington for pants, Lycra for swimwear and sheets with a thread count of 57 are not suitable for MNS masks However, the filtration performance of Burlington and the sheet improved markedly after ten washes.
Four other materials – poplin for shirts, printed cotton fabric with a thread count of 120, sports polyester, satin polyester – filtered 70 to 89 percent of the particles, which are “good” values for the barrier effect against coronavirus. & Inc. This was the case with cotton and satin polyester. slightly improved after washing ten times.
However, substances with a very good filtering effect have the disadvantage that they make breathing difficult. Of the materials with very good filtration performance, the classic t-shirt fabric made from 95 percent cotton and 5 percent elastane still gives you the most air. However, breathability decreases with washing. Two layers of sports polyester make breathing even easier.
