Honeywell North 5500 Series Gray Half Mask Respirator with MC/P100 Cartridges and Filters in size medium is a thermoplastic elastomer half mask that doesn’t sacrifice comfort and fit. Ideal as an economical respirator for sub-contractors plant guests and occasional users. Latex free. Niosh approved for use against organic vapor ammonia methylamine formaldehyde and acid gas (chlorine hydrogen chloride sulfur dioxide hydrogen sulfide hydrogen fluoride and chlorine dioxide). Niosh approved with Paper and Supplied Air to offer flexibility in the workplace.