In general, the thicker and more occlusive the better.  The best homemade options are triple layered cloths or clothes with filter inserts which have a bendable nasal bridge and fit snug.  Try a few materials.   A mask that is so thick that a child pulls it down is not a very good mask, even though it filters well.   Chose a mask the child will actually leave on. What is the best possible mask? N-95s (14) … Continue reading Mask Best Practices