I am looking for a mask to carry on an airliner. Recently there have been airline mishaps where the cabin filled with smoke. The latest American airline incident was a leaking iol seal in the engine that released oil smoke in the cabin.The passengers had to breath the smoke for a half hour before landing. Some of this smoke may have carbon monoxide. I dont see any filters that talk about this. Problem is to find a mask that can be carried on the plane without taking up a lot of room but one that protects against airliner cabin smoke toxins and last at least 30 min to an hour as may take a while for the airliner to land.