The USGI M40 Gas Mask is a great piece of protective equipment for military personnel and survivalists alike. This mask comes with a used filter, carrying satchel, spare lenses, owner's manual, and integrated rubber veil, and a waterproof bag. The M40 mask was designed to provide superior protection against chemical, biological, radiological, and nuclear threats, its durable construction and battle-proven performance make it a must-have for anyone in need of a reliable gas mask. 
 
*New filters sold separately, after use they must be replaced to maintain affectiveness. Any used mask is not guaranteed to be effective and should not be relied upon without thorough inspection.