PM2.5 Activated Carbon Filter Insert for Premium Masks, 10 Pack

PM2.5 Activated Carbon Filter Insert for use with Premium Thin Blue Line Masks 5 Layer Protection: Textile Cloth, Efficient Filter Cloth, Activated Carbon Cloth, Efficient Filter Cloth, Textile Cloth Dimensions: 12cm X 8cm / 4.72 inch X 3.14 inch Recommendation: Replace filter once weekly The filter 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. Thin Blue Line USA makes no warranties, either express or implied, that the filter prevents infection or the transmission of viruses or diseases.