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 says face covers should be routinely washed depending on the frequency of use, and that machine washing should suffice in properly cleaning a face cover. https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover.html
And She Did makes no warranties, either express or implied, that the mask prevents infection or the transmission of viruses or diseases. The mask should not be used (1) in any surgical setting or where significant exposure to liquid, bodily or other hazardous fluids, may be expected; (2) in a clinical setting where the infection risk level through inhalation exposure is high; or (3) in the presence of a high intensity heat source or flammable gas.