The US Military M9A1 gas mask bag is a field carry bag designed to store and transport the M9A1 protective mask system and related equipment. It provides secure carry and rapid access during chemical biological and field operations.

• Color: Olive Drab
• Material: Canvas or nylon depending on production run
• Function: Storage and transport of M9A1 protective mask equipment

Issued to U.S. military personnel for use with protective mask systems.