Full facepiece respirators 6000 series, reusable. Full 1 unit in pack, faceseal is made of silicone rubber for enhanced comfort and durability. Lightweight and well-balanced. Features large, hard-coated lens providing user a wide field of vision. Low-maintenance respirator offers user convenience and easier breathing. Cartridges and/or particulate filters required for all 3M 6000 reusable respirators. If a cartridge and filter are being used together, an adapter is required.