This is the FM53 Twim Port Specialist Responder Kit, the FULL kit, not the stripped version missing the filters and other items that is offered by some other dealers.
The mask, based on the U.S. M50/JSGPM (Joint Service General Purpose Mask), provides maximum operational flexibility to counter multiple threat scenarios, including chemical, biological, nuclear and radiological (CBRN) agents, Toxic Industrial Chemicals (TICs), and Toxic Industrial Materials (TIMs). The twin port design allows the user to utilize the mask in either a left hand or right hand configuration. This aids individuals armed with rifles, such as SWAT or snipers, as the non-filter side of the mask allows for a better cheek weld.
Can be used with the EZAir System for the greatest comfort, best air supply, best cooling, lowest fog risk, and greatest field of view.