You can make your own easily adjustable, comfortable, washable face mask for Home Use from common materials, that is safely removable. The mask has two layers of fabric and the top is open, like an envelope, for inserting an additional filter.
I have two versions – one with t-shirt material on the inside for longer use and comfort on your face and one with quality fabric for maximum protection.
I have expanded my tutorials and put them on my personal website at Marguerita McManus dot com.
The T-shirt Version with fabric and nose piece:
Here are the CDC Guidelines for masks: https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/diy-cloth-face-coverings.html