Typically, U.S. servicemembers are issued three MARK I Kits when operating in circumstances where chemical weapons are considered a potential hazard. Along with the three kits are issued one CANA (Convulsive Antidote, Nerve Agent) for simultaneous use.
The provision of three MARK I Kits and one CANA for U.S. service members operating in environments where chemical weapons are a potential threat is consistent.