MSA Advantage 1000 Chemical and Biological Warfare Agent Respirator, filters out chemical and biological particles in extreme quantities. This is not a dollar store gas mask and it is brand new in factory packaging. 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 $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. There is a part number on the canister so you can acquire replacements when needed. This mask is BRAND NEW in the factory packaging.