MSA Advantage 1000 Chemical Agent Respirator, filters out chemical and biological particles. This is not a dollar store gas mask. This mask is rated for serious applications and can filter out Tear Gas, OC Spray, Sarin, Mustard Gas, Anthrax etc. Has 6 point restraint web straps for securing the mask to the face. It's also equipped for ambidextrous canister filter placement to accommodate for both left and right handed firing positions. This mask retails for around $375 on the MSA website.  These masks are used by the DOD and Military due to their rugged reliability and full face shield for optimized visibility while in use. Lowball offers will be ignored so please don't waste your time. I have 1 size SMALL available. This mask is unused and is still in the factory packaging, the canister is also factory packaged in a foil bag to maintain the ability to fiter out contaminates over a long shelf life. There is a part number on the canister so you can acquire replacements when needed.