This half facepiece reusable respirator offers reliable and convenient respiratory protection and is suitable for many situations, helping provide protection against particulates and a wide variety of gases and vapors according to NIOSH approvals.  The 3M^™ Half Facepiece Reusable Respirator 6000 Series helps provide protection against particulates and a wide variety of gases and vapors when used with approved cartridges and filters. When properly fitted and used with approved 3M^™ cartridges and filters, this respirator helps provide protection at concentrations up to 10 times the Permissible Exposure Limit (PEL). The swept back design of the cartridges helps improve balance and visibility. Remarkably comfortable, soft, lightweight facepiece has easy-to-adjust head straps allow for a customized fit to the user. Replaceable cartridges help reduce waste and costs over time.  When ordering, please verify sizing as they are available in three sizes: Small, Medium & Large.  3M says that 80% of the population wears Medium, 15% wears Large and 5% wear Small.