I have been experimenting with patterns today and I think this is the best ones so far. The other flatter ones just do not hug the face completely unless it is tied with ties as described below..
Our doctor friend and neighbor whose expertise was personal protection at the CDC suggested that
" that some of the features that have shown positive results are if the fabric is starched, and in addition to the stabilizer piece to mold it over the bridge of your nose….that having ‘ties’ coming off the top and bottom corners of the mask allows it to be tied up over the crown of your head and therefrom the top of the mask to pull and tie it below at the bottom of on your head.
Any type of surgical mask is only 5% effective for protection for the wearer for airborne particles and that homemade cloth mask would be about the same.
The real value of the masks would be to control secretions (nasal and oral) expelled by someone who is infected with the virus when they cough or sneeze."
Also thank you Tom Phan for the information on the type of fabric needed:
The FDA Class 1 Fabric is the best. CDC recommended last choice is the worst cotton for covid-19 ptotect based on lab results. (SmartAir March 2020)
Best Medical Grade Material for mask
1. Hypoallergenic pillow case (69-90% against Covid-19)
Certified FDA Class 1 Medical Device
Breathable, Water & Blood Resistant
2. Hypoallergenic Case (69% effective against Covid-19) Non-FDA rated
General Purpose for Public Use
1. Cotton Linen Pillow case (60% effective against Covid-19)
2. Cotton Tshirt (55%)
3. Cotton bandana/scarf (30-50% effective against Covid-19) Recommend by CDC as last resort mask. One worst cotton material with holes, uncertified, abd inconsistently woven.
It is wonderful to see the community coming together. May be someone in the community could tell us which of these two is best. Thanks a lot.