Designed with smart and intuitive features, the 3M™ Secure Click™ half face piece reusable respirator HF-800 series is simple, comfortable and reliable. It comes with a speaking diaphragm which is designed to help provide easier communication while you work. The quick, easy, one-touch negative pressure push button seal check provides improved confidence in respirator fit. The 3M™ Secure Click™ half face piece 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 face piece comes with many innovative features that make it the 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 face seal provides a softer feel for more comfort on the wearer's face. The advanced silicone face seal material also offers increased durability for extended face piece 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 face piece 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 face piece 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 face piece 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 easier breathing. Two dual-flow cartridges on each respirator combine to create the world's first quad-flow cartridge system with four airflow paths providing greater breathability and comfort. Breathing hazardous levels of particles, gases and vapors can be harmful to your health. The 3M™ Secure Click™ half face piece 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 face piece air purifying respirator has an OSHA assigned protection factor (APF) of 10. It helps provide respiratory protection for concentrations up to 10X the OSHA permissible exposure limit (PEL). 3M™ 7100172051, Series: HF-800 Series, M Size, Secure Click™ Connection, 138 mm Overall Height, 125 mm Overall Width, Nylon/Silicone, Dark Gray