First off, I don’t claim to know the scientific truth on this subject. Use all of this information at your own risk. I am not responsible for the quality or trustworthiness of the information I am just trying to share it to help. I think in the end something is better than nothing when it comes to your health and well being
For a great breakdown on mask fits and different designs check out this great video
It’s being shown rice cookers and probably instapots/ pressure cookers could be used to sterilize new and used masks.
There are different design and thoughts on the best choice for homemade face masks. There are few studies that look at different materials and filter materials.
The University of Florida has a great page that shares info on making masks as well as jas plans to help you.
For a great hand sewn mask for those without a machine, this is a good tutorial but i don’t believe it offers a place to insert any type of filter.
The tutorial I based most of my masks up to this point has been this.
I have made a few changes like using ribbon instead of elastic and making mine a little bit larger.
Some other places to learn about designs and making masks.
Fabric Face Masks Resources
If you enjoy reading, science and charts and would like more information on filters and materials enjoy these links.