Three fashion designers have created a new homemade, surgical-style mask and are giving the pattern away for free.
Their design includes a pocket that can be filled with a material to help the mask filter tiny particles better than a mask made only from cotton, according some testing that they did.
After testing dozens of materials with rented particle-testing equipment, they discovered that certain blue shop towels, as well as a certain white industrial cloth, can help a homemade cotton surgical mask filter particles 2-to-3x better than cotton.
Their testing also showed that the fit of the mask was crucial to having it filter particles well.
So they designed a new mask for the legions of home sewers making masks right now.
This is not an FDA-approved N95 mask but is intended to be a better-fitting alternative to some of the other patterns for surgical masks circulating on the internet.