3M 1873V+ FFP3 Protective Face Mask Single Sealed High Filtration Boxes of 10. 3M Aura 1873V+ FFP3 Respirator Face Mask with Valve. The 3M Aura 1873+ FFP3 Respirator is desgined with a 3M™ Cool Flow™ Valve, which effectively removes the build-up of heat and provides a cooler and more comfortable wear.
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