To be used in the event of a mustard gas attack. Two of a pack of three anti gas eye shields for use in the event of a World War 2 'Air Spray' during the 1940s. The shields are made of cellulose acetate sheet with elastic ties and cushioned nose strip. They are in a brown paper envelope and contained within a cardboard pack printed with instruction on how to use them.3 EYESHIELDS, ANTI-GAS, MK 11/C.A. "AIR SPRAY" Packet also marked with instructions for use.wwii, anti gas, eyeshields, protective wear