LETTER: Easy way to make a mask
There is an easy and inexpensive way to make masks at home that reportedly are better than cotton sewn masks and more comfortable than 3-D printed ones. The design was recommended by Peter Tsai, the materials scientist who invented the electrostatic charging technology that N95 masks use. They are easy to make – about 5 minutes each – and are very inexpensive – about 5 cents. Here is a link describing how to make them: https://www.youtube.com/watch?v=mai-UqdNRi8/.
Ken Hanawalt
McMurray