Made in the USA. Three Layer Construction. Soft and Breathable Fabric. Washable and Reusable. One Size Fits Most Adults. All Sales Final - No Returns The mask should not be used in any surgical setting or where significant exposure to liquid, bodily or other hazardous fluids, may be expected; in a clinical setting where the infection risk level through inhalation exposure is high; or in the presence of a high-intensity heat source or flammable gas. Tekweld makes no warranties, either express or implied, that the mask prevents infection or the transmission of viruses or diseases. CDC Website link: https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/diy-cloth-face-coverings.html