Скачать или смотреть Duckbill Face Mask Sewing Instructions v1.0

this video (v1.0) shows the mask pattern with 4 separate ties.

*UPDATED*: v2.0 has a single tie with two attachment points, which makes the mask easier to put on/take off and uses less material for the tie (58 inches vs. 80 inches) - check out v2.0 here:    • Fabric Duckbill Face Mask v2.0  

Instructions for sewing a fabric "duckbill" face mask.
The DUCKBILL MASK improves on many widely used mask patterns:
1) INCREASES COMFORT by maximizing airflow and managing respiratory moisture
large interior surface area facilitates gas exchange and moisture dissipation
air flows throughout the mask interior instead of being blocked by fabric close to the mouth
2) ELIMINATES GAPS by making a good seal underneath the chin and sides of mask

Patterns and supplemental information:
https://sites.google.com/view/facemas...