Masks are only effective if they have an airtight fit.
That’s according to a scientific study published in the British Medical Journal. 1
![](https://cdn.shopify.com/s/files/1/0254/4707/1832/t/8/assets/mask-fit-results-1637155958040.png?v=1637155960)
Might as well get one that works.
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1. Study published in the British Medical Journal - https://oem.bmj.com/content/75/6/446