Single Mask, Maximum Flexibility: The Avon Protection fire hardened FM54 Air Purifying Respirator provides Specialist Operators maximum protection and total flexibility. The FM54 provides protection to the face, eyes and respiratory tract from Chemical, Biological, Radiological and Nuclear (CBRN) threats, Riot Agents, Toxic Industrial Chemicals (TICs) and Toxic Industrial Materials (TIMs) while maintaining extreme user flexibility as mission profiles change.