Why You Can Smell a Fart Through a Mask
by Beth Skwarecki on Vitals, shared by Beth Skwarecki from Lifehacker on (#561NM)
As that anti-masker having a tantrum in a Panera pointed out, you can smell a fart even though it passes through the fabric of your pants. Her point seems to be that fabric cannot block air, and thus masks cannot block things that are carried in air. She's wrong, but let's examine why.