Here's the bit that made a lot of people stop and think. Scientists keep finding tiny plastic particles turning up in human blood, lungs and tissue. Nobody's saying exactly what that means yet, the research is still catching up. But when something's uncertain, cutting back where it's easy just makes sense. You can't do much about the air on your commute. You can absolutely do something about what's pressed against your face for eight hours every night.
And that's really the whole idea behind The Muslin Blanket. Swapping the fabric nearest your face from plastic to cotton is about the easiest change you could make. You do it once, and it's done.