![]() WHO says “coating the fabric with compounds like wax may increase the barrier and render the mask fluid resistant however, such coatings may inadvertently completely block the pores and make the mask difficult to breathe through. Here are water-resistant fabrics you can sample from (USA) and My Fabrics UK. ![]() The best way to figure this out is to order samples, cover your nose/mouth with it, and see if you can breathe. The challenge is many polyesters aren’t breathable (it depends on how the fabric is woven). Hydrophobic means “the fabric will repel droplets and moisture” ( source). WHO recommends “…an outermost layer made of hydrophobic material ( e.g., polypropylene, polyester, or their blends) which may limit external contamination from penetration through to the wearer’s nose and mouth…” ( source, page 10). Inner layer (that touches your face): a water-absorbent fabric so it absorbs your droplets.They suggest polypropylene or interfacing. Middle layer: a synthetic, non-woven, water-resistant material.Outer layer (exposed to the world): water-resistant material.What fabric to use for 3 layer face masks ![]() Related post: 7 Ways to Make Adjustable Ear Loops & Straps for Face Masks Related post: Fusible Interfacing for Face Masks: Good Filter? Safe? Breathable?
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