Honeywell North HM500 Series Half Mask Respirators Softer material for better touch and seal with skin, for long-time use. Professional design for universal fit. Advanced over-molding manufacturing and design made for intuitive assembly and disassembly. Drop-down function replaces need to doff hardhat or earmuff for quick work break. Used with Honeywell North N-Series Bayonet Cartridges Pack of 1