A 7 inch by 8 inch gas mask with a hose and canister attachment the canister is 6 inch by 8 inch. The yellow colour of the canister means the canister is for acidic gases such as sulfur dioxide and hydrogen chloride. As this mask has a sand brown woven canvas bag to carry the mask in when not in use. This is the second, much more effective, version of the gas mask that required far less training and easier to use in emergencies.

The device had larger eye-pieces and a ‘small box’ filter of active charcoal. As it was worn on the chest, it saved precious time during attacks. It offered five hours of complete protection against chlorine, phosgene, hydrocyanic acid, chloropicrin, and arsine.