A blue folder embossed with a stylized eagle-and-wreath design surrounding the initials "RLB" over a swastika, identifying it as issued for members of the Reichsluftschutzbund (Reich Air Protection League). The cover is finished in a textured blue material with gilt lettering and emblem, while the interior is lined in a green-and-cream checked pattern with cream endpapers. The RLB was the civil-defense organization responsible for air-raid protection and civilian instruction on air-raid precautions in Germany during the Nazi era; folders of this type were used to hold membership documents, certificates, or identification papers for its members. The Reichsluftschutzbund was established in 1933 to organise civilian air-raid defence, training members in blackout procedures, firefighting, and shelter management as the threat of Allied bombing grew through the 1930s and into the war. Membership was widespread, encompassing millions of ordinary Germans who served as air-raid wardens and civil defence volunteers in their local communities. Document folders of this kind held membership papers, training certificates, or identification confirming an individual's role within the organisation.