Please follow this video tutorial by Christopher Paunil if you want to make this center seam face mask.
You can download the patterns and find detailed instructions to make this mask at FreeSewing.org.
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.