We've found a stash of these authentic military surplus gas masks, and we're passing the savings on to you with our unbeatable pricing! This like-new Czech M10M gas mask helps to protect the face, eyes and respiratory system against chemical and biological warfare agents in the form of gases, vapors, aerosols and more. Includes straw and filter. Note: Though these gas masks and filters may function as intended, they have likely exceeded their expiration dates and should be used at your own risk.