Escape and evasion map

Escape and Evasion Maps, also called silk maps or cloth maps, are maps made for servicemen to be used in case of capture or being caught behind enemy lines. Developed during World War II, these maps were used by many American and British servicemen to escape from behind enemy lines. These maps could be used without a rustle or crackling. They could also be hidden inside cloth uniforms, such as in a seam or inside a collar, that wouldn't betray their existence during a frisking or inspection. The silk maps could also be used to patch clothes, filter water, make a sling for an injured arm or to make a bandage. They could also be used to blow the nose. "The Allies needed to be able to print their clandestine maps on a material that would be hardier than paper -- material that wouldn't tear or dissolve in water and that would be light enough for the user to pack into a boot or cigarette packet at a moment's notice. (Silk maps, which have long been in use among militaries, have the added advantage that they don't make noise as they're being held or stored -- an important attribute, when you're a prisoner in search of escape.)"