The 3M™ Secure Click™ Half Facepiece Reusable Respirator HF-800 Series helps protect against particulates and/or a wide variety of gases and vapors when used with approved 3M Secure Click filters and cartridges. This facepiece comes with many innovative features that make it 3M's next generation in comfort, breathability and simplicity. The HF-800 Series comes with a push button seal check, allowing users to conduct a negative pressure seal check easily and quickly, prior to each use. The push button seal check provides increased worker confidence that the respirator is being worn properly. The speaking diaphragm is designed to help provide easier communication while you work. The silicone flex-joint faceseal provides a softer feel for more comfort on the wearer's face. The advanced silicone faceseal material also offers increased durability for extended facepiece life. The HF-800 Series head cradle buckles are easy to use with two-way adjustability – pull straps to tighten, squeeze the buckle wings to loosen. The exhalation valve helps direct exhaled breath and moisture downward. The HF-800 Series facepiece is low profile with a swept back filter/cartridge design to help provide compatibility with certain welding and grinding shields. The 3M Secure Click Half Facepiece Reusable Respirator HF-800 Series is NIOSH-approved for use with 3M Secure Click style cartridges and filters. This Secure Click connection style enables a quick, simple connection of the filters and/or cartridges. Simply align the connections on the facepiece and cartridge and/or filter and push until you hear a click. The innovative Secure Click connection provides wearers confidence that filters and cartridges are installed properly. Also, the Secure Click cartridges are dual-flow to allow easy breathing. Two dual-flow cartridges on each respirator combine to create the world’s first quad-flow cartridge system with four airflow paths providing breathability and comfort. Breathing hazardous levels of particles, gases and vapors can be harmful to your health. The 3M Secure Click Half Facepiece Reusable Respirator HF-800 Series can help reduce exposure to many contaminants when properly fitted and used with approved 3M Secure Click filters and/or cartridges. When properly fitted and used with approved 3M filters and/or cartridges, this half facepiece air-purifying respirator has an OSHA assigned protection factor (APF) of 10. It helps provide respiratory protection for concentrations up to 10 times the OSHA permissible exposure limit (PEL).