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Hi Nihar - Thank you for your inquiry. In general, our filtering facepiece respirators can be worn until they are dirty, damaged or difficult to breathe through. Please review the following FAQ for additional important details on respirators: https://t.co/QuANT50YJs Thanks!— 3M (@3M) August 5, 2020
We understand the difficulty. The global demand for respirators severely outstrips supply and it will continue to exceed supply for the foreseeable future. This requires us to continue to prioritize critical health care needs during this time. Thank you for your understanding.— 3M (@3M) August 4, 2020