As presented in the online talk organized by ID-Core Biotechnology in Quito Ecuador, this tutorial descripe the building steps of the mask.
Full Talk: www.youtube.com/watch?v=npY07jp6Svk
Full Article: www.microbiosdigital.wordpress.com
Mask Video:
The idea here is to present a mask with washable side parts which hold a one-way breathing part. But The breathing part could also be made using a washabel fabric material.
Keep in mind: The breathing part must be made of at least 4 layers.
Click on the picture to scale it:
This is the result: