This is a washable cotton face mask with a slot to to put your disposable paper mask inside or a filter of your choice.
some will have elastic and some will have cotton ties depends on what is available.
There’s an opening to insert the disposable face mask so that you can use it more often since there’s a shortage of the disposable face masks.
CDC on Homemade Cloth Face Coverings
CDC recommends wearing cloth face coverings in public settings where other social distancing measures are difficult to maintain (e.g., grocery stores and pharmacies), especially in areas of significant community-based transmission.
CDC also advises the use of simple cloth face coverings to slow the spread of the virus and help people who may have the virus and do not know it from transmitting it to others. Cloth face coverings fashioned from household items or made at home from common materials at low cost can be used as an additional, voluntary public health measure.
Cloth face coverings should not be placed on young children under age 2, anyone who has trouble breathing, or is unconscious, incapacitated or otherwise unable to remove the mask without assistance.
These masks have a pocket for a hepa 2000 level filter (guidelines say at least 1500) that will filter down to .3 microns.
Disclaimer: this face mask is not meant to replace the surgical face mask, it is a contingency plan for those who have no avail to surgical mask in the market. Proper use of a surgical mask is still the best way to prevent virus infection.