This Ultra Elite CBRN Gas Mask from MSA is designed to provide effective respiratory protection against chemical, biological, radiological, and nuclear (CBRN) agents that might be used in a terrorist attack, according to the stringent live-agent test regimen of the NIOSH approval process. Symbolizing safety, simplicity, and reliability, the Ultra Elite Gas Mask joins MSA's family of CBRN respiratory protection products for first responders to any incident, accident, or unknown threat. The Ultra Elite facepiece has been field-proven and trusted to provide an ideal fit, comfort, and value.