OLSON FITTED FACE MASK PATTERN

This is becoming a preferred pattern for several health organizations. Download the PDF that includes the pattern and instructions. There is also a very good Youtube video showing the construction of the face mask at 

Olson-Mask-with-Pattern REV (pdf)

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Olson Face Mask - HOW TO VIDEO

This is a video from Unity Health that shows the Olsen Face Mask being made. They also talk about how they chose the design.