Please follow this video tutorial by Christopher Paunil if you want to make this center seam face mask.
Disclaimer: Homemade masks will not prevent someone from becoming infected with Covid-19. These are approved by the CDC to be used as a last resort when all other PPE options run out. Healthcare providers and frontline workers are experiencing shortages who have made masks can use them on lower-risk patients allowing the availabe N-95 masks to be reserved for emergency cases.
This page is in response to pleas from frontline workers and care-facilities for homemade masks.