Onishi tested a range of masks: those made from cloth, non-woven masks, dust masks which met the N95 standard and other types, even the “Abenomasks” made of gauze distributed to every ...

A 2013 study found that cloth masks made from cotton T-shirts, pillowcases, or tea towels should be used only as a last resort — they only filtered out a third of the aerosols blocked by a ...